iCloud 서버가 응답하지 않고 있습니다.

iCloud 설정에서 나의 Mac으로 돌아가기를 설정하면 "iCloud 서버가 응답하지 않고 있습니다." 라고 표시됨.

환경

macOS Sierra 10.12.2

해결

1. From the iCloud System Preferences pane, uncheck the Back to My Mac checkbox to turn it off.

2. Open the Keychain Access app (in Applications/Utilities).

3. Click the "System" keychain (You'll see keychains near the upper left of the app window).

4. Make sure "All Items" is selected in the "Category" box below.

5. In the results showing to the right, look for any key whose "Kind" is "Back to My Mac key."

6. Delete the key(s), authenticating with your password to do so.

7. Back in the iCloud System Preferences pane, re-check the Back to My Mac box.