Cannot update macOS Apps - wrong Apple ID email

Cannot update macOS Apps - wrong Apple ID email

I have 2 updates pending on each of 2 Macs. Apple ID request email address is different email from current ID. I cannot get additional Apple ID as I cannot change ID email address to different (Active) Apple ID  - request returns ‘address not available.

If I could switch to working Apple ID. All would be OK. Running macOS 10.13.2

How can I do this?
MARSPATHRetired EE/Computers/ITAsked:
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David FavorLinux/LXD/WordPress/Hosting SavantCommented:
Just setup a unique gmail account for each machine + then setup each gmail account to forward to the account where you read your email.

Then each machine will have a unique email address.

And... I've setup many machines using the same email address, so I'm unsure why you're having problems.
JohnBusiness Consultant (Owner)Commented:
I do not think we can fix your machines by changing the settings in the machines. In this case, you must call Apple Support and ask them to assist.  Go to and check the Support links.

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Try opening the KeyChainAccess app click on passwords on the left and type AppleID icon the search box. This may tell you the correct AppleID.
MARSPATHRetired EE/Computers/ITAuthor Commented:
JohnBusiness Consultant (Owner)Commented:
You are very welcome and I was happy to help
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