Known Issues & FAQs - firelad97/PROM-PCSX2-Running-on-Mac GitHub Wiki
Known Issues
As security is no longer an issue, the wrapper still is not digitally signed. So the error "PROM.app is damaged" still exists. The only workaround to this is to disable Gatekeeper for each time you download a new version of PROM.app before enabling it again. The workaround can be found below.
FAQs
Q1: I got the error message saying PROM.app is damaged. What should I do?
A1: Because Gatekeeper needs to see that the app is signed, and since it doesn't, it prevented the app from running. The workaround is as follows:
Open terminal.
Enter this command to disable Gatekeeper:
sudo spctl --master-disable
Enter your computer administrator password when prompted. It hides the password for security reasons.
Open the app and click 'Open' when asked if you're sure.
It is safe now to close the app, and then enter the command to re-enable Gatekeeper.