.ARW export issue on Mac M3 Pro resolved by disabling GPU acceleration

[kampa4]

Hi everyone,
I’m experiencing an issue with Lightroom Classic (latest version as of today) on macOS (MacBook Pro with M3 Pro chip).
When trying to export RAW files in .ARW format (Sony), I receive a generic error:

“An unknown error occurred”

The issue is resolved by completely disabling GPU acceleration in:

Preferences > Performance > Use GPU for display and/or export

Once the GPU is disabled, the export works fine, although performance in the Develop module is noticeably reduced.

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System Info:

• macOS Sonoma [insert exact version, e.g. 14.4.1]

• MacBook Pro 14" with M3 Pro (Apple Silicon)

• Lightroom Classic [insert exact version, e.g. 13.3]

• RAW File format: Sony .ARW

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Hopefully this helps identify and resolve the bug.
Thanks!

[Aleke]

Hey @kampa4! Welcome to the community!

Could you share a bit more about the issue you're experiencing? Specifically, what version of Lightroom Classic and Sonoma are you using?

Is this happening with every .ARW file you export, or is it only affecting specific ones where you've used certain tools?

If you could share a sample file with us, that would be super helpful. You can use Google Drive, WeTransfer, or another file-sharing platform to send it over.

Thanks a bunch!

Alek

[Ian Lyons]

In addition to the information requested by @Aleke please post a copy of the Export dialog configuration. See attached screenshot for example of settings that are most useful when trying to reproduce your issue.