Lag in Typing in Yosemite's Mail w/ External Apple Keyboard

If you don't see anything in this almost two year old discussion that is helpful (and I certainly don't see how it could be) you need to start a new discussion in the macOS Sierra community where many more people will be able to see it. I may be the only one following this, not sure why I am and won't be any longer.

That's just the way these Forums work best.

Yep, absolutely - I hadn't noticed it was only in Mail but you are right. Driving me ****!!* crazy.

Mine is the same on Late 2012 Mac Mini. It's very frustrating. Did you guy's do a clean install or an upgrade install of Yosemite?

upgrade from Mavericks. I have done a PRAM and SMC reset, no avail. Doesn't matter which port my USB keyboard is plugged in either, off a hub or direct, the lag is still there.

I am having the same issues with some pretty noticeable typing lag within Mac Mail. Doesn't seem to matter what keyboard for me BTW, whether the external Mac keyboard or the one built onto my late 2013 MacBook Pro Retina display 15" laptop.

I've also tried just about everything, I could find to fix, but nothing is working so far. Any pointers on what to try next would be appreciated. I am super frustrated with performance now on Yosemite.

I did an upgrade from mavericks as well. I noticed it awhile back in the Dev Preview. When I upgraded to the GM it went away for awhile. I have noticed the typing is slow in every app not just mail, however in mail it's really pronounced. In Word it's very slight but there.

Same problem since upgrading to Yosemite.

I have an iMac (late 2012), 8GB RAM. 3.4 Ghz i7 processor.

Very frustrating and disheartening. I expect more from Apple.

On long emails, I draft in another word processor then paste into Mail.

Haven't noticed it as much in other apps.

Same problem. But only in Mail. Retina 13inch with clean install of Yosemite using builtin keyboard or bluetooth. Impressive bug.

Im having the same problem, any solution from Apple????????

Same problem here. Only in Mail, so far. Very annoying ...

I'll jump in here with a 'me too' post. I originally upgraded my Mid-2010 MacBook Pro from Mavs and noticed a very intermittent 2-5 second lag when typing in Mail. I haven't seen any typing delay in other apps.

I have also reinstalled Yosemite from the Recovery partition and it didn't help.

I'll jump in here with a 'me too' post. I originally upgraded my Mid-2010 MacBook Pro from Mavs and noticed a very intermittent 2-5 second lag when typing in Mail. I haven't seen any typing delay in other apps.

I have also reinstalled Yosemite from the Recovery partition and it didn't help.

Has anyone spent enough time in Safe Boot (shift key at startup) to see if this text entry delay happens without any 3rd party software? I wonder if we all have some similar 3rd party utility which might be causing this.

My old MacBook Pro does some really slow/janky video stuff while booted in Safe Mode in Yosemite - I assume Apple didn't include some video driver for my old hardware, so SUM isn't a very good test on my machine.

Here's a list of a few third party extensions/software I'm running, in case there is a common thread across our machines:

Keyboard Maestro (keyboard macros) 6.4.7

Timbuktu (screen sharing) 8.8.5

Snapz (screen capture) 2.5.4

ClipMenu (multiple clipboards) 0.4.3

1Password 5.0.1

ClamXav 2.6.4 (with Sentry running set to monitor several folders)

GFXCardStatus 2.3

Dropbox 2.10.41

CrashPlan 3.6.4

Anyone with this problem running any of these utilities?

Kirk out

Apologies for the duplicate post above.

I just did two (related) things that seem to have fixed the slow text entry delay in Mail on my machine. I'm 99% sure it was #2 below, but since I changed two variables (bad scientific method - my bad!), I'll mention both:

1. Validated all fonts with Font Book. I don't *think* this fixed the issue.

2. Changed default message font to Helvetica Neue (was Helvetica) in Mail > Preferences > Fonts & Colors > Message font

Since changing the two things above, Mail hasn't stuttered while entering text. Fingers crossed. I'll report back if I start seeing it again.

Kirk out

Changing the font to Neue does not help me here. Nor Font Book fixes. Worth noting that the lag does not begin until at least 6 or more lines down in an email. ie. only longer emails experience lag.