If you upgrade to two-factor authentication, you can’t log in to your Mac with an iCloud password

Apple slipped in a change in April 2016 that’s affecting people who change the protection on their Apple ID accounts.
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Apple
    Related:
  • Security
  • Cloud Computing
  • Mac
  • MacOS
  • iCloud
Glenn Fleishman’s most recent books include Take Control of iOS & iPadOS Privacy and Security, Second Edition (covering iOS 15/iPadOS 15), Take Control of Your M-Series Mac, and Take Control of Securing Your Mac. In his spare time, he makes Tiny Type Museums. He’s a senior contributor to Macworld, where he writes Mac 911.