I've been using this mac for about 8 months with my current wifi setup. For some reason, one day I just started getting a lot of ERR_NETWORK_CHANGED errors in Google Chrome. Nothing has changed, I have not moved my router or my Mac and the devices connected to the wifi are the same, yet I still get these errors. I did not apply any software updates to my Mac so I don't know what the root cause could be. What are some possible causes in a sudden uptick of these errors?

My MacBook Pro (2017 ver. / no ethernet port) is connected to a WiFi connection and I am trying to use Internet Sharing so that I can connect my Philips Hue Bridge to the internet. I quickly bought a USB-C to Ethernet adapter from Amazon thinking that would work but I am guessing this can only be used to get an internet connection to my MacBook from a router/modem, instead of sharing the connection from the MacBook to another device? Any insights/help would be greatly appreciated.

I recently had to clear some network related settings and preferences in order to get online at an airport using a captive hotspot. This was done because the login window was not opening in Safari or any other browser. I tried using http://captive.apple.com , but it would not launch the window. After these changes were made, I was able to get online on the airport wifi, but I am now unable to connect to my remote website servers using SSH in the Terminal app. When I try to connect to various remote servers, the connection hangs and eventually times out. I have tried connecting to multiple servers using verbose output, and the following is returned: OpenSSH_9.8p1, LibreSSL 3.3.6 debug1: Reading configuration data /Users/username/.ssh/config debug1: /Users/username/.ssh/config line 85: Applying options for * debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 21: include /etc/ssh/ssh_config.d/* matched no files debug1: /etc/ssh/ssh_config line 54: Applying options for * debug2: resolve_canonicalize: hostname 178.128.228.188 is address debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts' -> '/Users/username/.ssh/known_hosts' debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts2' -> '/Users/username/.ssh/known_hosts2' debug1: Authenticator provider $SSH_SK_PROVIDER did not resolve; disabling debug3: channel_clear_timeouts: clearing debug3: ssh_connect_direct: entering debug1: Connecting to 178.128.228.188 [178.128.228.188] port 22. debug3: set_sock_tos: set socket 3 IP_TOS 0x48 Nothing is returned after the set_sock_tos line. Things that I have tried: - Tried enabling/disabling the built-in firewall, but it does not correct the issue. - Tried removing plist files from Library > Preferences > System Configuration and restarted my MacBook to allow macOS to rebuild the preference files. This did not work. I backed up all of the files prior to completing this. **Update** Preference list files backed up and removed from the Library > Preferences > System Configuration folder: - com.apple.airport.preferences.plist - com.apple.wifi.message-tracer.plist - NetworkInterfaces.plist - preferences.plist I am able to connect to the servers via SFTP in Transmit with no issues, and can do the same via SSH on my iPhone using Prompt. No other changes were made while trying to connect to the airport Wifi using the captive hotspot. Any ideas on how to resolve this issue?

For the life of me I cannot resolve this issue. I was given a 2013 MacBook Air and upgraded it to Big Sur using my work’s WiFi. At home it will connect only to the 5GHz network (it will not connect to 2.4GHz it says “incorrect password” even though it’s correct). Once connected it shows the green dot and connected IP, however no webpages will load. I’ve spent hours trying things online such as: 1) Restarting router/modem 2) Deleting system configuration files in the preferences library 3) Changing network options under the network pretences for DNS 4) Forgetting the network and re-adding it 5) Starting in Safe Mode - problems still persist 6) Clearing DNS cache via Terminal 7) Adding “new” locations 8) Making sure time/date/region settings are correct 9) Turn off firewalls and removing anti virus software 10) Checking router blacklist & settings I do not know where to go from here, the laptop works on other connections as well as my phone Hotspot. Most errors in the browser window are “DNS_PROBE_... NO INTERNET” When I checked my DNS via Terminal, there are 7 resolvers all unreachable and at the bottom under (for scoped queries) Reachable (8.8.8.8) I have fiddled around with so many different “fixes” online and nothing has worked. Any advice would be highly appreciated

I’m trying to retrieve the name of my Wi-Fi network via the terminal, but I’m encountering some issues. I tried with the command:

/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -s

However, it returns the following warning:

WARNING: The airport command line tool is deprecated and will be removed in a future release.
For diagnosing Wi-Fi related issues, use the Wireless Diagnostics app or the wdutil command line tool.

I also tried:

networksetup -getairportnetwork en0

But it returns:

You are not associated with an AirPort network.

Even though I am connected to Wi-Fi. I have tried disconnecting and reconnecting, as well as deleting the following .plist files in /Library/Preferences/SystemConfiguration/:

com.apple.airport.preferences.plist
com.apple.network.identification.plist
com.apple.wifi.message-tracer.plist
NetworkInterfaces.plist
preferences.plist

Despite these efforts, I still have not resolved the issue. I **DON'T** want to use wdutil since it requires the sudo password. Is there any way to fix the problem with networksetup, or is there an alternative method to retrieve the Wi-Fi name? Specifications: macOS Sequoia 15.0 Apple Silicon M3 Pro **UPDATE:** Today I reset my mac to the factory settings and the system installed Sonoma as the default OS. I have tried the terminal command networksetup and it works fine. After updating again to Sequoia the problem appears again so I think the problem is directly related to this new update. Unfortunately, I can't find any info about deprecation or warnings on the man.

I am running macOS 13 (Ventura) on a 2020 Intel MacBook Air with an iPhone 11 Pro running iOS 16.1 and a iPad mini running iPadOS 16.1. I started to use Wi-Fi syncing for my iPhone and iPad again after years of not doing that. Just decided, “Hey! Why not try it again?” Turned it on while hooked up via USB cables, have successfully synced a few times with purely Wi-Fi and no issues. Great! Smooth syncing and backups with no wires! But I experienced an odd issue: If I “eject” the iPhone and iPad mini I can only get them to show up after rebooting the MacBook or oddly just waiting a while. No real logic as to what triggers them to show up again. Is there any explicit way to get an iPhone or iPad that are set up for Wi-Fi syncing to show up again under “Locations” after ejecting them? FWIW, I found this official Apple doc titled “Sync content between your Mac and iPhone, iPad or iPod touch over Wi-Fi ” which states: > “Important: If you don’t see your device in the sidebar, choose Finder > Settings, then select the CDs, DVDs and iOS Devices tickbox.” But when I go to settings, I get this crazy situation where a search shows “DVD or CD Sharing” in the search results but when I go to the actual “Sharing” settings I see tons of options and 100% no “DVD or CD Sharing” item? What’s up with that? Screenshot below.

My MacBook Pro running macOS 12.2.1, fails to connect to any Wi-Fi network after it has been asleep for some time. I open my laptop assuming it will be connected still, which it is not, then when I go to reselect the network it should already be connected too, it connects for a couple seconds then disconnects. I have to restart my MacBook just for it to hold it's connection. I'm assuming this is a software bug, does anyone else have this issue?

Lately my Mac cannot connect to any scanners. I get this error message every time I open the system scan tool on any of the connected scanners: Failed to open a connection to the device (-21345) I've tried removing all scanners and re-installing. I've tried doing "reset print system" on each connected device and then rebooting my system. I've tried buying a brand new scanner (HP Deskjet 2755e in this case) but that new scanner has the same issue. Tried updating to Mac OS 11.6 Big Sur. This is the 2nd Mac I've had that is affected by this and so far the only thing that has ever (temporarily) fixed it is wiping the entire thing and reinstalling my system. I shouldn't have to do this every time I get this error. All the scanners are connected over Bonjour AirPrint. How do I fix this?

So if you joined a network in the past and trusted its certificate while at it, and saved it on your iPhone/iPad. Sometime later, if either: 1. It’s the same network but their previous certificate has expired and they’re now using a new one or 2. Your device finds another network with the same SSID, which does not have the same certificate (has no certificate or has a different certificate) Will your iPhone/iPad alert you or will it quietly join without asking you about anything?

(MacBook pro 16" 2019 big sur [latest]) I have a problem with my wifi. I noticed that my browser gets "stuck" by not loading pages, or taking too long doing that (any browser). I tested this using the command in the terminal: ping 8.8.8.8 and noticed that it misses packets every once in a while and then gets back to normal. sometimes this happens with big chunks of packets, and sometimes with 1-4. I tested this on my android phone which is located right next to my macbook and connected to the same wifi network with a 100% success. Can you please help me resolve the problem?

I have a MacBook Pro Retina 2012 running Mojave. I was using USB ethernet on my Mac and sharing that as a WiFi to my android phone. All was stable. Last week I had a partition error while I was resizing the disk and OS had crashed. I had to reinstall Mojave. Now I’m trying to use the same setup. MacBook is getting internet from USB ethernet fine. I then shared the ethernet into my WiFi like last time for my Android. The Android connects to the WiFi but this time keeps saying no Internet. Mac can connect to WiFi, but cannot share internet through it. (I would guess the NAT server is not working or something like it) I don't know how to diagnose the problem and fix it. Please suggest.

Every time, I try to use my hotel's WiFi network, at some point of loging-in to it, I see that my browser (or WiFi connection pop-up) is redirecting through serie of websites, among which I can clearly see http://captive.apple.com/ . The thing is that I have absolutely nothing in common with any Apple-like device, because: - I'm using either PC and Windows 7 (with Chrome) or Android device (with WiFi pop-up), - I'm pretty sure that neither my hotel network's router nor any of its components isn't build up based on Apple device, simply due to costs (non-Apple-based solutions are cheaper, I think). [This answer](https://apple.stackexchange.com/a/290467/46952) and [this question](https://apple.stackexchange.com/q/211593/46952) roughly explains (to a non-Apple user, like me), what this site or service is used for. But, the question remains: What it has to do with non-Apple devices or how such devices can be using it (how or why non-Apple device can be using Apple-like service)?

Just to clarify this is not an issue with the captive WiFi page disappearing or not being able to get to the WiFi login page, the issue is that when I click the text input field to enter the password the page crashes immediately so I am unable to enter the password. I am at work and I can normally sign into my work WiFi on my iPad easily by typing in the password on the captive WiFi page but for some reason tonight every time I tap the text input field to type in the password the page closes/crashes. This is on my personal iPad, but we also have work iPads and those are working, I am able to connect to the WiFi by typing in the password. So far I have tried: - Turning off and on my iPad - Closing all apps - Deleting safari history - Switching default browser to Chrome - Resetting the WiFi at my work It seems like a glitch, as on my iPhone and on the work iPads the captive WiFi page doesn’t crash when I click/tap the password input field. Has anyone dealt with this problem before?

I'm trying to help my stepfather (remotely) set up his new M3 MacBook Air, but we're getting stalled at the point of connecting to his new, Bell Canada, WiFi. We have the correct SSID and password from his old system, but when we look at the network list in Setup Assistant, it shows up as an unlocked WiFi and when we try to connect to that it fails. Trying the "Other…" option to manually enter SSID and password results in a "Network name or password incorrect" when we KNOW they aren't. Is there a way to completely bypass the network setup steps of Setup Assistant? We can skip WiFi setup, but then it wants an IP setup using DHCP or manually.

I have a question regarding the setup of a hotspot on my Mac. I have a wired ethernet connection, which I connect to the computer. I would then like to be able to connect to that same connection (and the LAN) on my iPhone over wifi. I followed the steps on [How to Create a Wi-Fi Hotspot in macOS](https://www.maketecheasier.com/create-wifi-hotspot-using-mac-os-x/) which worked, however, there is a problem. Whenever I do this, the Macbook acts as a router, not allowing me to access any devices on the original LAN the Mac is connected to. I would instead prefer if it acted more like an AP, allowing communication to flow between my iPhone and everything on the LAN. To clarify, the important thing here is that I can't access any devices that are already present on my LAN. I have an IKEA Tradfri hub connected via ethernet to my router. Also connected to my router is a powerline adapter. The second powerline adapter is connected to the Macbook I was talking about. So now, when I connect to the Macbook's wifi, I can't access the hub. (This is, however, possible from the Macbook - I checked via a ping request, and there is no app available for Mac as far as I know.) My Macbook is therefore acting as a router, where the ethernet cable is plugged into the port that says Internet. I need it to act like an AP or a router where the ethernet cable is plugged into a normal LAN port. I hope this clarifies the difference.

I have a Macbook and an Android device (Oneplus phone) on same network and the Macbook connects via USB LAN (or Wi-Fi), Android device via Wi-Fi. I detected the following anomaly: - I can ping the Oneplus from the Mac:

64 bytes from 192.168.1.127: icmp_seq=3 ttl=64 time=30.433 ms
--- 192.168.1.127 ping statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss

- I can ping the router from the Oneplus - However I cannot ping the IPv4 address of the Mac - I took a look at the traffic in Wireshark and I got the "host unreachable" message to the ICMP requests - I also started to host a simple HTTP server, but it seems the Mac does not response to the TCP SYN segments, because I could see RTO flagged segments (Retransmission Timeout). (3-Way handshake never completed) - Fan fact, recently my ISP started issuing IPv6 addresses and I tried to ping the Mac from the Oneplus:

--- 2001:*:*:*:*:*:*:7e50 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms
rtt min/avg/max/mdev = 6.737/33.397/108.664/43.467 ms

It was working as the above log shows. Mac's firewall is disabled and there is no firewall rule applied in the router. I removed all network interface under the *System Preferences / Network* menu and added them again. I also selected the *Link-local only* option at the *System Preferences / Network / interface / Advanced / TCP/IP / IPv6 Configuration* tab. Unfortunately none of them worked. My question is why did IPv6 ping work and IPv4 not? Could be the problem the recently introduced IPv6 addresses? **[Edit]** I created a Hotspot with my iPhone and connected with both of the Mac and the Oneplus. This Hotspot does not have any IPv6 configuration, but I experienced the same issue. I also created a Hotspot with my Mac to eliminate the router from the circle and I connected to it with the Oneplus. Like every time, I could not ping the Mac, despite the Oneplus gets IP address via DHCP from the Mac. (So there was network traffic)

I bought a Mac from a friend and it’s completely fine, the problem is to activate the Mac I need to connect it to WiFi, and to do so I need a keyboard. The friend who sold it to me gave me their keyboard too but I can’t connect it because there’s no Bluetooth button anywhere. I’m on the first screen when you get a Mac, there’s a message that says I need to connect to WiFi and then there’s the Apple logo. When you click it three options appear: Startup Disk, Restart and Shut down, no Bluetooth button. Any help appreciated.

I am using macOS 11.4 and padavan firmware on the router. It's quite slow (a few to tens of seconds) when I connect to the router's admin page from macOS, and tcpdump showed that a lot of tcp connections are stuck at the first handshake, the router didn't reply with SYN/ACK after macOS sent SYN. There's no such problem when I connect to the router from another device or visit another website from macOS. Are there special options/headers from macOS' tcp package? ``` 00:48:25.374383 IP mbp.lan.59304 > router.lan.http: Flags [S], seq 1796724219, win 65535, options [mss 1460,nop,wscale 6,nop,nop,TS val 1596083099 ecr 0,sackOK,eol], length 0 00:48:25.475394 IP mbp.lan.59304 > router.lan.http: Flags [S], seq 1796724219, win 65535, options [mss 1460,nop,wscale 6,nop,nop,TS val 1596083200 ecr 0,sackOK,eol], length 0 00:48:25.576576 IP mbp.lan.59304 > router.lan.http: Flags [S], seq 1796724219, win 65535, options [mss 1460,nop,wscale 6,nop,nop,TS val 1596083301 ecr 0,sackOK,eol], length 0 00:48:25.677740 IP mbp.lan.59304 > router.lan.http: Flags [S], seq 1796724219, win 65535, options [mss 1460,nop,wscale 6,nop,nop,TS val 1596083402 ecr 0,sackOK,eol], length 0 00:48:25.778906 IP mbp.lan.59304 > router.lan.http: Flags [S], seq 1796724219, win 65535, options [mss 1460,nop,wscale 6,nop,nop,TS val 1596083503 ecr 0,sackOK,eol], length 0 00:48:25.879255 IP mbp.lan.59304 > router.lan.http: Flags [S], seq 1796724219, win 65535, options [mss 1460,nop,wscale 6,nop,nop,TS val 1596083603 ecr 0,sackOK,eol], length 0 00:48:26.080421 IP mbp.lan.59304 > router.lan.http: Flags [S], seq 1796724219, win 65535, options [mss 1460,nop,wscale 6,nop,nop,TS val 1596083804 ecr 0,sackOK,eol], length 0 00:48:26.481605 IP mbp.lan.59304 > router.lan.http: Flags [S], seq 1796724219, win 65535, options [mss 1460,nop,wscale 6,nop,nop,TS val 1596084205 ecr 0,sackOK,eol], length 0 00:48:27.283921 IP mbp.lan.59304 > router.lan.http: Flags [S], seq 1796724219, win 65535, options [mss 1460,nop,wscale 6,nop,nop,TS val 1596085006 ecr 0,sackOK,eol], length 0 00:48:28.885169 IP mbp.lan.59304 > router.lan.http: Flags [S], seq 1796724219, win 65535, options [mss 1460,nop,wscale 6,nop,nop,TS val 1596086607 ecr 0,sackOK,eol], length 0 00:48:32.086355 IP mbp.lan.59304 > router.lan.http: Flags [S], seq 1796724219, win 65535, options [mss 1460,sackOK,eol], length 0 00:48:32.099170 IP router.lan.http > mbp.lan.59304: Flags [S.], seq 4020057176, ack 1796724220, win 14600, options [mss 1460,nop,nop,sackOK], length 0 00:48:32.099295 IP mbp.lan.59304 > router.lan.http: Flags [.], ack 1, win 65535, length 0 00:48:33.432798 IP mbp.lan.59304 > router.lan.http: Flags [P.], seq 1:2, ack 1, win 65535, length 1: HTTP 00:48:33.466137 IP router.lan.http > mbp.lan.59304: Flags [.], ack 2, win 14600, length 0

I'm trying to connect to a mixed 2.4 GHz and 5 GHz Wi-Fi. When trying to connect with the right password, my Mac is asking me to type the password again. By checking the logs, I was able to find what was the error:

_Apple80211AWDLCompatibilityInternal: unsupported get ioctl on awdl0 for APPLE80211_IOC_CURRENT_NETWORK

The first time it happened was random, I was on the internet and connected to the same Wi-Fi and then suddenly I didn't have access to the internet and my Mac was asking me to type my password. By running ifconfig, I was able to see that, both, awdl0 and llw0 were inactive (which lead to Airdrop and Airplay being unusable). I was able to activate awdl0 back but not llw0. Here are the things that I have tried so far: - Forget Wi-Fi - Removing the following files:

sudo rm /Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist 
   sudo rm /Library/Preferences/SystemConfiguration/com.apple.wifi.message-tracer.plist 
   sudo rm /Library/Preferences/SystemConfiguration/NetworkInterfaces.plist 
   sudo rm /Library/Preferences/SystemConfiguration/preferences.plist

- Reset NVRAM/PRAM - sudo ifconfig llw0 up (not working, llw0 still inactive) - Restart in safe mode - Manually adding the Wi-Fi - Reinstall macOS - Try another session None of them worked. I also tried providing an IP address manually throughout my router's interface but it didn't work as well. Separating 2.4 GHz and 5 GHz worked but only for the 2.4 GHz bandwidth. 5 GHz on my MacBook works well on a different Wi-Fi. I have a 13 inch MacBook Pro M1 Sonoma 14.5 (up to date) Any ideas? I want to avoid a factory reset.

My friend and I use our MacBooks from a local coffee shop sitting at the same table. My Wifi connection is much worse than hers is. Using option + click on the 🛜 menu, which reveals network information, I see that we are on different channels: - 108 (5 GHz 80 MHz) works fine for my friend - 11 (2.4 GHz 20 MHz) is slow for me I would like to reconnect on chanel 108, to match her configuration. Hopefully this will improve my connection. **Things I've tried** Per [Apple's support forums](https://discussions.apple.com/thread/253936398?sortBy=best) , I tried this command:

sudo /System/Library/PrivateFrameworks/Apple80211.framework/Resources/airport --channel=108

This command has no immediate effect. Repeating the command with the -c flag, which shows the channel number, indicates that it stays at 11. However, if I repeat the command with the -z flag, which disconnects the connection, the channel *does* become 108, but only briefly. When I reconnect to the WiFi, it reverts to channel 11. When I scan all networks with the -s flag, I see two items listed with the same SSID, one at channel 11 and one at 108. So, the channel I want is "right there" and my laptop just isn't using it. Someone else on Stack Exchange [asked a similar question](https://apple.stackexchange.com/questions/100383/wifi-channel-selection) years ago, and was told that the channel simply cannot be changed except at the WAP. Naturally in a coffee shop I don't have access to the WAP. As my friend is able to use the other channel it seems to me it's a matter of configuration in our laptops. How can I change the channel? I am on a MacBook Pro running Sonoma 14.2.1