Q: Does Yosemite Improve or Reduce Performance?

Yosemite is the windows vista, the windows 8 and ehem windows 9 and  10 of the Mac...

Its crap even by its look and feel.

If your an artist, and use your Mac for art, other than browsing the web and typing documents.... stick to Mavericks , Mountain Lion or Snow Leopard if you got these as factory OS when you got your Mac. Getting my Mac last year and soon as possible, before Yosemite became preinstalled on new machines, was the best choice I had done. I have no regrets, I could see the S-t wave coming. When looking at Microsoft when I left. If I got a machine with Yosomite, I would be working most of the time in the windows bootcamp partition with Windows 7 Ultimate, and my mac partition would hardly be used.

For all those who have or want to switch to a third-party SSD or make a DIY Fusion drive with it.

Please read this carefully:
http://www.cindori.org/trim-enabler-and-yosemite/

That's why your Yosemite behaves sluggish.

I've had similar issues.  I upgraded a macbook air 13 circa late 2010 2 gb ram, and a 2009 macbook pro 15" mid 2009 4 gb and they now crawl.  It was clearly the upgrade and it seems Apple is not paying attention to the issue.  I'm in the process of recreating a boot disk for mavericks so I can reverse back.   I have a 2010 iMac with 8 gb RAM and it seems to be fine.  So I believe it has a minimum req but Apple did not state this.

I regret not backing up because I've had such great luck on all the previous ones (of course, the ones when I backed up).

I'm reversing back to Mavericks and going through the painful process.

I personally don't think that it is so difficult for everyone that has tried snow leopard, lion, mountain lion, maverics, yosemity, to realize that every single next release of Apple's OS is worse than the previous. Maybe some UI features are cool but performance?! No, no, no.

Every year along with os upgrade we must consider adding memory, SSD, etc. Or even better, for Apple, buy a new machine.

Backwards compatibility? No! Developers having really difficult time alternating their code every year to support new OS releases, believe me.

My opinion: If you're doing work with your mac, stay with the os that works best for you. If you' re a developer... well you know what to do!

PS. The crazy thing here is that we all as mac users, very often accuse and make fun of MS Windows and their users! BUT windows performance is really good and it has GREAT backward compatibility. Even the most recent versions of Steinberg Cubase, NI Traktor, Adobe Photoshop run on Win XP!! and all of my apps developed in 1998 still run perfectly on Win 7,8 - The same executable .

Vassilios wrote:

 

I personally don't think that it is so difficult for everyone that has tried snow leopard, lion, mountain lion, maverics, yosemity, to realize that every single next release of Apple's OS is worse than the previous. Maybe some UI features are cool but performance?! No, no, no.

It's quite difficult for me. I didn't have a problem with any of those OS's on three different Macs. I didn't notice a performance hit, but I didn't much care for Lion.

With the possible exception of Lion each new OS has been faster and more stable in my experience.

I installed it on my MacBook Pro Early 2008 (5400rmp drive, 6GB RAM), and I can't find much difference with Mavericks. In some cases, I would say that the UI is slicker than the older one. Starting from power off is about 70 seconds. Going to sleep might be slightly longer than Mavericks. The system seems sometimes more reactive, just by a hair.

To be sure of working in the best conditions, you should update all applications before running the installer, clean the drive with something like Cocktail or Onyx, and, after installing the new OS, zap the P-RAM by restarting with Cmd-Opt-P-R kept pressed (until you hear the second rebook sound).

There are still a lot of rough corners, the blue icons will hurt your eyes and the grey ones will make you feel sad, the new crayons in the color picker are an hymn to amateurish design, but the new look fits a lot better with my MBP design. Now, if they could tune-down a bit all that blinding color…

Paolo

Really? So your yosemite mac perform like Snow Leopard ha? Or even better that Mavericks!

Except if you have bought additional memory or you may have SSD, as I already mentioned in my commend.

Maybe your are one of the guys that test the performance by measuring the turn off - turn on of their computer.

I cannot understand you all! Everybody (just google it) complains about yosemite performance and you just don't experience it.

Take care...

Vassilios wrote:

 

Really? So your yosemite mac perform like Snow Leopard ha? Or even better that Mavericks!

Except if you have bought additional memory or you may have SSD, as I already mentioned in my commend.

Maybe your are one of the guys that test the performance by measuring the turn off - turn on of their computer.

I just don't install crapware on my Computers.

For me Mavericks is a great OS, and so a performance hit would seriously put me off. Can anyone share some experience they've had with the full version please?

I ended up going back to Mavericks because some issues were created when using iMovie HD 06. There are workarounds, but it was just easier to go back to Mavericks.

OSX Yosemite 10.10.2, CLEAN INSTALL, Macbook Pro Retina Mid 2014 Iris Pro 5200 16Gb RAM, i7-4770hq, 256gb ssd.

UI laggs like ****, very poor performance. (opening application folder from dock -grid or fan, resizing windows etc.). If I choose from resolution - Feels like 1920x1200 everytime I restart it takes 3-4 seconds to rescale all graphics.UI lagg is a well known issue caused by HiDPI, a technology used by yosemite to make UI scale everything like working on  1440x900 resolution while maintaining the 2880x1800 actual resolution for sharpness. I tried installing SwitchResX and if I switch to actual 1920x1200, 1680x1050 or 1440x900 resolutions, all UI lags disseaper. If this is a well known issue I don't understand why Apple won't release a fix !

Can't confirm.

The FIX. It's now April 25, 2014. Here is how to up grade and fix what Maverick & Yosemite. I have done a 3.1 Mac Pro 2008 and MacBook Pro 17 I7 2010.

I installed Solid state drives 1 tir & 500 gig drives.  THE MEMORY HOG that started with Maverick is gone! (Taking way to much time to load programs.) Both are now running 4 times faster. And so far all 3 party programs working very fast to.

GO with a solid state drive!

jetoff41 wrote:

 

I'm not the only one who feels like that - a lot of my friends (MB Pro Retina 13 & MB Air 13 etc.) have the same issues...

Do you want to do anything about it or just moan.