Mail is Slow and lagging.

I too have had good response on the machine upgraded to Ventura. That shows something got fixed in Mail in Ventura, so now whatever that was needs to be back-ported to Monterey, since Apple supposedly supports 2 earlier OS versions. My laptop is not eligible for update to Ventura, so stuck with slow mail rendering on Monterey.

Updating to Ventura temporarily fixes the problem, but it won't last.

Mine was fine for a few days, now it's back to taking OVER TWENTY SECONDS to load any mailbox (inbox, sent, draft etc.).

My problem is that Gmail isn't updating the SENT mail folder in Apple Mail - it's often blank - and takes X minutes before I can find a message there. The inbox is better, but it's really laggy in accessing the IMAP folders. Wasn't like this before I was using OS Monterey (previously High Sierra).

I have similar problem. the difference is that speeds are excellent on my iPhone. Same network and email address, in the same room. It seems if I shut down and remove power entirely, things improve a bit and gradually worsen.

PaulD

I have the same problem with very slow Mail such as opening emails, deleting emails, etc. I rebuild the inboxes (I have 5 different email accounts), then it sometimes is close to normal but then deteriorates later. I'm not sure if some preference is corrupted. I don't see on other macs with same email setup. I suppose I should reinstall macOS Monterey next. Running current macOS 12.4

I have a M1 MacBook Air, an M1 Mac mini and a 14" MacBook Pro M1 Max.

All are always updated to the lasted Mac OS Monterey (currently 12.5.1)

I have three Mail accounts (Apple iCloud, Gmail, Comcast) all configured in Apple Mail app on each Mac.

M1 MacBook Air and M1 Mac Mini have always been just fine in Mail performance.

Mail performance on the 14" MacBook Pro M1 Max is horrible. Blank Mail windows for 5 to 10 seconds until messages listing are displayed. Switching between accounts takes 10 to 20 seconds until the Mail app messages listing is displayed. I have tried rebuilding mailboxes, no change. Restarting the Mac helps, but then degrades and gets worse until next restart.

Again, only the 14" MacBook Pro M1 Max has poor Mail app performance. All Mail settings are exactly the same on all three Macs.

Hi Jimmych1,

Been dealing with this for months. Final solution found Saturday. My Mac was 6+ years old. Saw gradual decline as each new OS was added. Finally slow mail was the killer. Bought new Mac and it is WONDERFUL. Don't know age of your equipment...just say-un...creeping obsolescence !

For my iMac, the problem does not seem to be in downloading.

I see the headers immediately, and even a few of the messages, with time to read one or two. Then all the message fields go blank. Even old messages in other folders, long since read, go blank. After a few minutes, all the messages, new and old, reappear.

Since the problem affects old messages stored in Mail folders on my hard drive, I don't think it is related to downloading.

So here is what I have done:

1. Not one thing mentioned here works for everybody. I believe the problem is with Mail itself.
2. I have opened a ticket with MacPaw describing the problem and asking if CMM could have anything to do with it. I was hoping they could duplicate it.
3. Their immediate response was to use their modules individually rather than as Smart Scan, which has 3 categories totaling 7 selectable modules. The modules under Speed, which are Optimization and Maintenance, manage selectable Launch and Login items, and under Maintenance there is one called Speed Up Mail. None of those changed the problem.
4. I have specifically asked MacPaw if anything in the design of CMM could adversely affect the functioning of Mail, and this may exceed the scope of the Help staff to answer. It reminds me of the question "when did you stop beating your wife."
5. I have told them of reports that Apple may have fixed the problem by OS 13, but there is not enough input yet.
6. I have ordered a new iMac 24, mainly in order to be able to run Ventura OS 13, and also to see if it fixes the Mail problem.

I think you may be right, seems to be better with Ventura 13.0. I've noticed that everything is slow to open on this Mac that I bought in 2020 or '21. Seems to take forever just to open up and get things onto my screen.

All three of my Macs have been updated to Ventura and latest update: now at 13.0.1.

Three Macs: MacBook Air M1, Mac mini M1, 14" MacBook Pro M1 Max

All three Macs configured the same in Mail and in iCloud. No plug-ins or third-party apps. I don't like to use third party plugins, apps or utilities.

The 14" MacBook Pro M1 Max is still slow with blank Mail windows for 10s of seconds with no activity showing in the Activity window.

The MacBook Air M1 and Mac Mini M1 are perfectly fine and responsive with no delays or blank windows.

I am starting to become convinced it's something to do with OS level M1 Max process/thread handling in Mail.

I have a new Mac Studio M1 Max and mail is excruciatingly slow! Seconds of lag for each character when typing a message.

The message pane takes sometimes a minute to show new mail.

You mean you do see the Extension panel in Prefs, but it is empty.