While Apple's iCloud Keychain works on older Macs, this article doesn't state you can't setup 2FA on older Macs. You'll need an iPhone, iPad, or macOS device that is running latest OS.
While Apple's iCloud Keychain works on older Macs, this article doesn't state you can't setup 2FA on older Macs. You'll need an iPhone, iPad, or macOS device that is running latest OS.