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Force CFExpress cards to be seen as removable media?

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1 answer
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- Typical camera software (Capture One, Lightroom, and others) has special workflow behaviors for devices flagged by the operating system as removable media. (Personally, I'm trying to use the Capture One "Delete after import" flag). - MacOS flags some CFExpress devices as non-removable SSDs rather than removable media (References: (https://discussions.apple.com/thread/254919311?sortBy=rank) , (https://discussions.apple.com/thread/252410911) , (https://discussions.apple.com/thread/252153280?sortBy=rank)) . This appears not to be specific to MacOS; there are similar reports on Windows and Linux, though in the latter it can be overridden by udev rules. - CFExpress is increasingly common for cameras that require high write performance Is there a way to solve this by updating MacOS configuration (as udev rules can override the way hardware presents itself on Linux), or do we need to be making feature requests to the developers of software that trusts the operating system's designation of devices as removable or otherwise to allow that designation to be overridden? ---
$ diskutil info /dev/disk4
   Device Identifier:         disk4
   Device Node:               /dev/disk4
   Whole:                     Yes
   Part of Whole:             disk4
   Device / Media Name:       TAPIR SANSA_20 Media

   Volume Name:               Not applicable (no file system)
   Mounted:                   Not applicable (no file system)
   File System:               None

   Content (IOContent):       FDisk_partition_scheme
   OS Can Be Installed:       No
   Media Type:                Generic
   Protocol:                  USB
   SMART Status:              Not Supported

   Disk Size:                 512.1 GB (512110190592 Bytes) (exactly 1000215216 512-Byte-Units)
   Device Block Size:         512 Bytes

   Media OS Use Only:         No
   Media Read-Only:           No
   Volume Read-Only:          Not applicable (no file system)

   Device Location:           External
   Removable Media:           Fixed

   Solid State:               Yes
   Virtual:                   No
Note Removable Media: Fixed.
Asked by Charles Duffy (353 rep)
Jun 28, 2025, 02:31 PM
Last activity: Jun 29, 2025, 04:09 AM