Mac Mail Syncing Issue
I've had an issue with Mac Mail not syncing fully with Gmail on my iMac. It's set up via IMAP. On my MacBook Pro (currently with Maverick), the changes sync instantly. On my iMac (21.5-inch, Mid 2011, High Sierra 10.13.6), it syncs the emails, but does not clear out the emails I've already read and archived elsewhere, i.e. on the MacBook. This has been happening for some time--even before Maverick came out. Apple Support call did not result in a fix. Any advice?