iCloud Keychain
I cannot set up Keychain on my mac. Every time I try it say "iCloud keychain could not be turned on. Try setting up iCloud Keychain again". What do I do?
MacBook Air
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See the article https://support.apple.com/en-in/HT203783
If iCloud Keychain is corrupted in Mac .
( a ) Use an iPhone and sign in with same Apple ID and password in your Mac .
( b ) In iPhone go to settings , iCloud open keychain and click on advanced two options will be shown reset code and reset iCloud Keychain , click on reset iCloud Keychain .
( c ) A verification code will appear on your mobile number through sms and it will prompt to generate a code , think of code and fill up in the field so keychain will be set up in iPhone , write down this code .
( d ) Come to Mac in system preferences > click on iCloud the box of keychain is unchecked , so tap the keychain box , it will show waiting for approval click on option button , enter the passcode that is generated in iPhone , click on confirm .
( e ) Again in iPhone a pop up will appear showing approve or deny for name of Mac to approve for keychain , click on allow .
( f ) In Mac click on option button enter trusted number a sms will appear having a verification code , enter it hence the trusted number will be saved and visible and finally keychain is set in Mac ( turned as on ) .
Always post the version of iPhone / Macs .