Apple - The message "You do not have permission to open the application" is shown when trying to open a downloaded app
In playing with the Triangulator app I found the following issues on Big Sur:
- When decompressing the .zip, the application contents didn't retain the execute bits. Add it back with
sudo chmod -R 755 /path/to/app. - Since the application was downloaded by a web browser (in my case) the quarantine bits are set on the decompressed files. Remove that with
sudo xattr -dr com.apple.quarantine /path/to/app.
Once those issues are remediated then the application can be launched.
-Eric