mac app store tells me to log into account to update apps(that I don't own) but that is not my account and I never heard of this email. Is there a fix for this?

After I removed the pirated FaceTime, the problem is resolved. It seems that pirated applications are the problem.

I confirm, when i've delete FaceTime (i don't know if Facetime was infected or not) the twitter update disappeared.

Yes it works! Thanks a lot for your explanations babowa. 😉

I agree with some of the others: why installing pirated software? Especially facetime, it's not exactly expensive, so why not just lash out those few bucks and buy it?

No solution here.

I removed the "infected" Facetime and got a cleaned App Store.

After installing Facetime from the App Store, problem reappeared.

Got it. Still had a corrupte copy on an external HD.

Everything seems ok so far.

Kryn Sporry wrote:

I agree with some of the others: why installing pirated software? Especially facetime, it's not exactly expensive, so why not just lash out those few bucks and buy it?

I bought ALL of my apps from the MAS and got an infected/pirated Facetime from THERE (I am willing to show my bill). I spend one buck (79 Eurocent). I would appreciate to get a clean software even if I spend 1 penny for it. It´s not a matter of money but of trust which got lost. Apple will not be able to buy this from me again.

I was finally able to resolve this issue. Thank you for all your work and comments on this thread.

Turns out I had a copy of the Facetime app file on an external drive.

What I had to do (besides deleting Facetime from Applications with AppZapper) was:

I had to quit the App Store. Then I had to delete the other Facetime file with AppZapper, AND THEN I had to Secure Empty my Trash bin to get all the files to delete.

Once I did this Twitter left my updates available tab (I had never actually downlaod Twitter), so I had no updates. Then I was able to download Twitter from the main App Store.

I hope this helps anyone who is still stuck! This took awhile for me to get fixed!!