CR3 Previews Not Working in Finder After macOS 15.4 and 15.4.1 Updates

Hello,

After updating to macOS 15.4 (Sequoia), I’ve encountered an issue where RAW files in the CR3 format from my Canon camera no longer display previews in Finder. Both the thumbnail previews and the Quick Look feature (activated by pressing the spacebar) show a black rectangle instead of the image.

I hoped that updating to version 15.4.1 would resolve this problem, but unfortunately, the previews remain non-functional. This issue significantly hampers my workflow as a creative professional, making it challenging to sort and select photos efficiently.

I’ve attempted restarting my Mac, checking for system updates, and verifying security settings, but the problem persists.

I’ve noticed that other users are experiencing similar issues. For instance, on the TidBITS Talk forum, users report that Finder’s Quick Look displays a black rectangle for CR3 files, although the Preview app and Adobe applications can open them without issues. 

Similarly, a discussion on Reddit highlights that Canon RAW files appear blacked out in Preview or Quick Look on macOS Sequoia 15.4, affecting users’ workflows. 

On the Canon Community forum, users have reported that Preview is unable to open CR3 RAW files from the Canon R6 Mark II on macOS, indicating a broader compatibility issue. 

Has anyone else encountered this problem? Are there any known solutions or workarounds?

Thank you in advance for your assistance.

• Model: MacBook Pro (14-inch, 2021)
• Chip: Apple M1 Max
• Memory: 32 GB
• Storage: 2 TB
• macOS: 15.4.1 (Sequoia)