Compilation of "App" Failed

[Anthony_G_Cyphers]

You might try this, modifying the command to match your version of Xojo, in case you recently updated and it somehow became quarantined, but I’m not sure that’s the cause:

Did r3 change plug-ins?

Execute this command in a Terminal: sudo xattr -cr /Applications/Xojo\\ 2019\\ Release\\ 3 However, if you drug the Xojo folder from the DMG to Applications via Finder, that SHOULD have been taken care of automatically.