This is not a serious problem, but a curious one. After various recent problems, mostly fixed with disk repair, my Apple Mail program still doesn't highlight related messages as it used to, even though this is still checked in the preferences window.
But that also holds all of your account info, there's a chance it's held in the caches also, so you might try this first...
Safe Boot from the HD, (holding Shift key down at bootup), it will try to repair your Disk Directory while the spinning radian is happening, so let it go, run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, then move these folder & file to the Desktop.
Thanks! If I try this, can I then trash the folder & file on my desktop without also deleting them from their primary location?
Incidentally I recently got two messages with the
exact same subject heading and it was again highlighting the previous message. Previously it was highlighting all messages from the same sender, at least that was my impression. Prior to my original post it wasn't highlighting even the ones with the exact same subject heading, and it's still not highlighting messages with similar subject headings.
If I try this, can I then trash the folder & file on my desktop without also deleting them from their primary location?
Yes, it's not likely that we'll need them for anything to start with, just common practice to move them to the Desktop first as the one in a million safety factor.
Thanks! I'm putting this on hold as it turns out that previous disk repair was incomplete and more serious problems occurring. However, very useful to know that moving this type of file to desktop is only making a copy. Mail is currently only selectively highlighting messages with exact same subject heading. Very weird, after many years of trouble free operation I feel like I'm suddenly back in Microsoft PC land!
