Hello guys ! I'm interested in this matter, Indeed like @edford said with Mac Apple Silicon the app should not need any modification. But what if I do want to make some things different when I'm on a mac !? Is the only solution using Mac Catalyst ? or can I test if i'm "running my iOS app on Mac os" somehow?

Actually the answer was on edford's answer, just use NSProcessInfo : if (@available(iOS 14.0, *)) { 				if ([NSProcessInfo processInfo].isiOSAppOnMac) { 						NSLog(@"I'M ON MAC"); 				}else{ 						NSLog(@"IM NOT ON MAC"); 				} 		}

Hello, thank you for your answer. Done : FB17064641 (Calling Storefront.current works as expected when testing in Xcode local test environment, but doesn't when testing in the sandbox.) May I add that even with Testflight and a legit production user from China it does not work. At this point I can only pray it will work if I release the app to the Appstore.