How to resolve Slow Email Opening on macOS Monterey 12.4

A great shame that Musk didn't spend his money on buying Apple.

He could have fired the incompetent morons responsible for this fiasco, then given those left standing five working days to fix the problem that Apple are still unwilling to fix.

Solved!! thanks to a previous poster I followed his directions, opened mail preferences clicked on privacy and unchecked protect mail activity. This completely solved the issue and I left hide IP address as checked. Perfect thank you to the previous poster. Who suggested I try this.

Whilst I am delighted it solved your problem, some of us are still struggling with a system that is clearly unfit for purpose and which no one at Apple wants to discuss!

So back to Thunderbird for me.

I have tried all solutions that are proposed in this thread but none of them fixed the problem. The issue is very frustrating and it severely affects anyone who is using e-mail for business making the Mac Mail application mostly unusable. One more reason to stay away from Apple products.

I have a 2014 MAC Mini with the same problem of delayed opening messages. I found a great solution, cheaper than a new Mini.

1 - Open up "All Sent" and delete everything over 12 months, keeping the recent important stuff.

2 - Open up "All Trash" and delete everything.

3 - Open up "On My Mac" & all "Import"s and delete everything. (I had over 700!)

My MAC mail now works without any delays, and my Notes and Numbers apps also open faster.

This is not a proper fix but a workaround. I set up a new space just for mail in mission control and leave Mail open there all the time and I have no problems viewing messages.I just have to switch to that space when I want to use Mail. It's not ideal but at least I don't have to wait 5/10 minutes for a mail to open now! I hope that's helpful to others in this situation.

I have the same problem. I have been an Apple customer since 1984 many multiple purchases and subscriptions over the years BECAUSE while Apple was the higher priced it was a better product. It seems that is no longer Apple's intention or performance and we need to shift I think to Gmail and PCs or Chromebooks.

I am using MacBook Air from 2013. Mail is very strange !!! Sometimes you opened it and have 5-6 seconds you can see the mail content then on next letter it is white. You can see it by hitting reply or close open the mail. This is on version 12.6.2 latest. I have also the same MacBookAir from 2013 but with version 11. There are no such problems with the same mail account. So it is 100% software BUG ! Something is locking the mail client. Yes i have tried disable / enable / uninstall antivirus AVG. Also disable enable any kind of spam filtering / hide ip stuff. The problem still stays the same. Also Safari very often locks up the same way like mail client. Apple do something !

Amen. It's all about money with Apple, they don't care about their loyal customers or any customers for that matter. And the newer the machine, the poorer it's made.

And any rival for world dominance that gets in their way: kaboom they crush them (eg. Facebook: Apple in one stroke killed their business model).

I updated my iMac 2019 from Monterey to Ventura. No problems!! And its fantastic.

Solved my irritating slow e-mail opening and other issues. I called Apple support and they held my hand through the update which takes a while since its so big.

Again fantastic!! I'm a happy customer.

Wow...that's terrible. My MacBook air is updated out...so doesn't do any good to have a newer mac.

Apple is such a disappointment: newer machines are terrible. And machines/devices get discontinued with no support, as soon as they can throw another one at us.

That's what happens when a bean-counter gets put in charge.

What was Jobs thinking?

Hi again M/N kopperman:

Found an easier workaround that worked for me (previous Community thread on this subject).

Mail/Preferences/Privacy

uncheck "protect mail active"

Check "Hide IP address"

This seemed to work!

The problem continues. No problem using the iPhone or iPad, but on the MacBook Pro 15-inch, Mid 2015 it's just a pain in the tRump since installing OS12. Currently using 12.6.3 and no improvement. And of course the MacBook Pro Mid 2015 can't be updated to the new OS. Thanks Apple!

This has been plaguing me for over a year. The 'REBUILD' did nothing to fix this, I have several types of email accounts including gmail and Mac using the apple email program and all were problematic as described above. Even though I regularly delete trash/junk, I went into the settings > accounts > mailbox behaviors and changed the 'erase deleted messages' and 'erase junk messages' to 'when quitting email' ... then quite email program and restarted and now it is back to its function from a year ago... I suspect that somehow it was not actually deleting the junk/trash and was searching a mountain of trash. This was a continuous irritation and really quite annoyed that apple did not correct this despite all of these posts for over a year.

To imagine that Apple will screw your mail app. up so you buy a new computer is nuts!! Yes, it's been an irritation and yes I was thinking of moving everything to Gmail but this thread reminded me that I had installed MailButler, which I can't remember using. Confined the files to the trash and hey, presto fixed. Wasn't Apple's fault all along, it was Mail Butler, perhaps!