OK, I repeated this procedure on macOS Sonoma, Apple Silicon chip.
So:
- I first make sure that I downloaded the correct build - “GPStreamdeck-RC1-macOS-arm.zip”
- I copied the file in the Extensions folder.
- I started Gig Performer and stumbled upon this warning message:
- This is how you fix it: Apple can’t check app for malicious software – Apple Support (UK)
- I used the first (“Finder”) method and it worked great.
- I quit Gig Performer and started it again:
- OK, now we are talkin’. The extension installed successfully and works OK:
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Does this work for you?


