changed apple id password and messages on mac not working

( 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. ( 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. ( a ) Use an iPhone and sign in with same Apple ID and password in your Mac. See the article If iCloud Keychain won't turn on or sync - Apple Support If secondary authentication account is set there will be option button in front of keychain box, try to set up iCloud Keychain. Note : whenever an Apple ID or its password is changed from Mac, if other iPhone is synced the Apple ID ( here only Apple ID is going to be changed ) it has to be updated from iPhone What to do after you change your Apple ID or password - Apple SupportĪre you using 2FA or secondary authentication account ? Sign in with your Apple ID - Apple Support

See the articles How to create a new Apple ID - Apple Support

In fact you had created multiple accounts from Mac system preferences > internet accounts its ok they can be added, but the way of signing Apple ID is different in your Mac. If you have created a web mail address say with gmail services and its mail address and password should be exactly same as Apple ID and password signed in Mac system preferences, say its, and this id should also be signed in your iPhone on the same network the enable this account, will appear in mail preferences, you must not use only iCloud web based account Web-only access to iCloud - Apple Support A query what is method of signing Apple ID in iPhone and Mac.

Changed apple id password and messages on mac not working