SD card not automatically appearing in Finder on Mac

In this post, I describe how to fix an issue whereby an SD card does not automatically appear in Finder on a Mac after you insert it.


Cause

If you have a Mac with Apple Silicon, you have to approve new SD cards that you connect to it.  The following prompt should appear however it was flashing up and disappearing before I could press Allow. 

Screenshot of Allow accessory to connect prompt


Resolution

To resolve the issue: 

- Open System Settings

- Click Privacy & Security in the left hand sidebar

- In the right hand pane, scroll down to Allow accessories to connect and change the drop down to Automatically When Unlocked

Screenshot of Privacy & Security Allow accessory to connect automatically when unlocked

The SD card should now appear in Finder when it is inserted

Related Links

- Allow accessories to connect (Apple)

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