I set up 2FA on my iMac on OS X 10.11 but then I want back to OS X Mountain Lion, because OS X El Capitán made my computer really slow. Now I can't sign into OS X Mountain Lion because it doesn't support 2FA. Is there any way to deactivate it?
Not now, no. And you can use 2FA with older hardware and older iOS and MacOS versions. Just enter the code directly after your password, so password123456
Not now, no. And you can use 2FA with older hardware and older iOS and MacOS versions. Just enter the code directly after your password, so password123456
From the article posted above.
If you recently updated your account, however, you can unenroll for a period of two weeks. Just open your enrollment confirmation email and click the link to return to your previous security settings.
How do i disable two Factor Authentication?
