Jul 18, 2018 I seem to have gotten stuck in MacOS / Xcode purgatory. I'm on OS Sierra/10.12.6. When I try to update, I get a warning, that there's an issue with upgrading vs DisplayLink and so it cannot be done. That directly conflicts with Xcode which (as of now, on App Store) only works on 10.13.2 or later. Xcode 12.5.1 supports iOS 14.5, iPadOS 14.5, tvOS 14.5, watchOS 7.4, and macOS Big Sur 11.3. New in Xcode 12.5.1. Addresses a stability issue related to opening the Organizer window. Fixed an issue where XCTest code wasn't generated after pressing the Record button. Additional bug fixes and stability improvements. Jul 28, 2020 Currently i'm trying to get Squirrel up and running with macOS 11 and Xcode 12. The major Problem is how outdated the used 3rd Party Libraries are and that macOS 10.8 is being dropped from Xcode 12. ReactiveCocoa was moved to ReactiveObjC and the versioning is completly different from the ReactiveCocoa Repository.
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