`signin` disabled on macOS 10.13+

As of version 1.4.2 the signin command has been disabled on newer versions of macOS. This is an interim workaround to the crasher first identified in #107.

mas 1.4.2 was never released through Homebrew, so it must besownloaded and installed manually from the 1.4.2 release or built from source using Xcode.

😞 Situation

In macOS High Sierra (10.13) Apple removed the -[ISAccountService signInWithContext:replyBlock:] method from the StoreFoundation private Apple framework which this app relies on to authenticate users through the signin command. I have done a lot of digging and debugging but have not found another API that works to authenticate a user with the Mac App Store.

Users running older macOS versions (10.9-10.12) are unaffected.

👉🏻⌨️ Workaround

Sign into the Mac App Store GUI app manually. Once signed in MAS app, the mas command should work fine.

I know this is not an ideal scenario, especially for script automation. Hopefully, I'll find a real solution to this soon.

Please 👍 this issue if you are affected by it.

Related: #107, #129, #147, #155, #159, #160, #162

Start by reviewing the signin command and the crasher described in #107, then investigate the StoreFoundation authentication API across macOS 10.9–10.13+. The work is complete when signin can authenticate users on newer macOS versions without the reported crash, while older supported versions remain unaffected.