Upgrade to Catalina has crippled Mac Mail
There are dozens of threads on how the upgrade to Catalina has crippled Mac Mail (one of the most basic of programs that I've used and relied on for my personal and work use). Is there an official Apple response on how to fix this program. Using Mail is crippling my CPU leaving the rest of my Mac unusable as well. Spikes to 400% when I open mail. I have a few O365 accounts routed into MAIL, several Comcast accounts as well as two gmail accounts.
I've read the Gmail accounts are the problem. I tried removing them - no dice
I've read the O365 might be the problem - again removed and no dice -
Tried zapping PRAM - no go.
Rebooted countless and countless times. Tried wiping out Mbox library - nada.
Has APPLE responded to this most basic service and why it is now Fubar?
Thanks
MDJ