Over the past couple of months I have been porting an existing Unity game to macOS. It is a shoot-em-up called Blue Rider developed by Ravegan from Córdoba, Argentina. It was originally released on PC (Steam), XBox, Playstation 4, and Switch.
I spent quite a lot of time getting it ported and running smoothly only to find that I couldn’t get past Apple’s notarization procedure because of the version of Unity I am using (5.6.7f1).
The binary uses an SDK older than the 10.9 SDK.
Notarization is required as of macOS 10.15 to distribute games in the Apple Store and it may become necessary on Steam. It may also be useful to notarize games for standalone distribution to avoid confusing warnings when users try to run your game.
(I am going to hold off a whole rant about Apple and their BS requirement to do this code signing/notarization at all. And I will try not to rant too much about their incredibly complicated process, documentation, and implementation.)
In this post I’ll describe the main problem I ran into and how I solved it. Hopefully it will help someone else.