
39:15 - It's possible to conform to the UNNotificationContentExtension protocol to show custom content when a notification is received. 32:45 - By default, eligible iOS apps will apps will appear in the Mac AppStore (developers can opt-out). It uses the same Catalyst infrastructure to port the iOS AppKit to the Mac (but unmodified apps won't be able to get the advantages the Catalyst offers). 32:05 - Apple Silicon Macs will be able to run the majority of iPhone and iPad apps without recompiling. 24:50 - Rosetta is completely integrated in MacOS Big Sur, so if you have an Intel app that hasn't been recompiled for Apple Silicon, it will run automatically - you can test the emulation in Xcode, targeting My Mac (Rosetta). To create an universal version, you need to switch and compile for "Any Mac (Apple Silicon, Intel)". During development, Xcode builds only for the current processor architecture, to save time. 18:02 - For most apps, all is required is to open the project in Xcode 12 and recompile it. In this way it's possible to distribute a single executable and it will run on every Mac, independently from its processor architecture.
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17:10 - Universal apps contain code compiled for both Apple Silicon and Intel they are merged together in a single executable the OS chooses the right one.
Platforms State of the Union Apple Silicon Macs and Big Sur So I've thought that it would be better to write them here. Quite immediately, I had the need to takes notes on technical aspects or API. As passionate Apple developer, I have started watching the various WWDC20 videos.