I can't log into iCloud from my MacBook
It is not possibil to log on "icloud/internetkonti" from my mac book. It is okay on my iphone and ipad ?
[Re-titled by Moderator]
MacBook Air 13″, OS X 10.10
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Macs running less than Sierra can't run Apple ID accounts that have been switched to MFA, without a little trick.
If you have an iPhone or iPad, or a newer Mac able to login your AppleID, a verification code will appear on that machine when you attempt to use the older Mac to login the AppleID. Use that code immediately at the tail end of your password to login the Apple ID.
10.12.4 is the minimum Mac OS to get the code dialog to appear on your Mac.