Yosemite slow on Macbook Air

Sorry I can't help you, I just have the same problem with my MBPr 13" 2014. Some transition are laggy, and the whole system just feels unstable. For instance, even displaying the Application folder (docked) content uses more CPU than any other app, and the animation is slower than in Mavericks.

I did a fresh install (and even tried several times). Never had problems with this MBP before or my previous ones.

Hope we can find some solution..

I am also noticing this issue. 8GB 2013 MB Air, I am noticing that I am continuously in swap- around 1GB. This is new behavior since upgrading to Yosemite.

Same issue for me. Macbook Air End 2013 . 8Gb memory.

The whole system is very very slow. I want to throw it through the window !!!!

Otherwise, I have no problem on my imac.

I found something that helped me with the same problem. Read Frank C's response Folder Action Dispatcher I just turned disabled and re-enabled it. One thing to look for in Activity Monitor is to see what is causing it to run sluggish. In my activity monitor Folder Action Dispatcher was not responding and it said 40GB. I only have 8 GB on my MBP 2011. Hope this helps.

Had the same problem, finally realized that the FileVault Encryption was struck at 19%. Speed back up to normal after I disabled FileVault using terminal command - sudo fdesetup diable

To check whether the FileVault is the culprit, go to System Preferences --> Security & Privacy --> FileVault to see if encryption is in progress.. For me the blue bar was less than a quarter with status 'estimating time remaining'..

Then open Terminal and type in: sudo fdesetup disable

It will then ask for the admin password (to be it asked twice), then it was disabled... Back to normal life again..

Here is my terminal log for reference:

Last login: Tue Oct 21 23:05:13 on console

Gowthams-MBP:~ asgowtham$ fdesetup status

FileVault is On.

Encryption in progress: Percent completed = 18.80

Gowthams-MBP:~ asgowtham$ fdesetup status

FileVault is On.

Encryption in progress: Percent completed = 18.80

Gowthams-MBP:~ asgowtham$ fdesetup status

FileVault is On.

Encryption in progress: Percent completed = 18.80

Gowthams-MBP:~ asgowtham$ sudo fdesetup disable

Password:

Enter a password for '/':

..fdes.

FileVault has been disabled.

Gowthams-MBP:~ asgowtham$ fdesetup status

FileVault is Off.

My problem still exists. I looked at the above replies regarding "Folder actions" and "File vault" and neither apply in my case.

I am finding that at a reboot, performance is fine, but slowly degrades over a 24 hour period. swap is actually well within normal amounts, and no single process is eating all of the CPU cycles.

Still pondering on this one...

Try shutting down your computer and let it off for a couple minutes, then turn it on again.

I am the kind of labtop users who just closes the lit down every day, and I was having the same problems, until I started shutting down my computer more often.

Having the same issue, very annoying! None of mentioned tips helped. Macbook air 6.2, 8GB RAM.

Having the same issue. Late 2013 rMBP with 16GB of RAM, and the bumped up i5 processor.

Let's just hope a fix puts an end to this.

One thing that's worked for me so far was to turn off the translucency features in system preferences (System Preferences --> Accessibility --> Display --> Reduce Transparency). It does reduce some of the visual appeal of Yosemite, but I've noticed a sharp increases in responsiveness with gestures and windows.

Late 2013 rMBP

8 GB RAM

Standard i5

Same for me on my mid 2013 Mba, i5, 4gb.

My main issues are : 1 - the transitions like expose that really become choppy when theres 3+ windows on the screen.

2 - swiping the notifications bar on is also really laggy

3 - scrolling in finder is a disaster

4- and just overall performance drops everywhere along with little glitches here and there.

What fixes it: These issues for the most part go away if i reduce the transparency in accessibility, but i shouldn't have to do that, its crazy how apple can release such an incomplete OS.

I had the same issue on my mac air with slowness and fan running fast. My fix was to reset the System Management Controller (SMC). The instructional link for doing so is Intel-based Macs: Resetting the System Management Controller (SMC). Hope this solves your problem. /a

Try one of the many fixes suggested in this slow Yosemite post here. I tried all of them and am not sure what exactly worked but Yosemite is running like a dream now.

So i completely reinstalled my MBA with a new clean Yosemite and now it works fine. But overall I am not so excited about the speed and responsiveness of the system ... :-/

And now i reseted everything possible on my MBA as posted by Ilingworth81 and finally Yosemite performs well 🙂.