For me it seems that way. I am curious if anyone else has problems on 2012 and older macs. I have a iMac '07 with 4 gigs of ram, and a Mac Mini from '11 that has 2 gigs of ram. Think they could run Yosemite okay or should I stick with OS X 10.9?
I installed both Yosemite and El Cap on my MBP (see my sig). Yosemite was just awful and although El Cap was an improvement over that, it still could not compare to the snappy response that I get from my Mavericks installation.
I am now firmly and happily back with Mavericks and do not see myself moving from this anytime soon.
I think you should stick with Mavericks.
Hope it helps.
Upgrade her to 16gbs of ram as well...My wife has a 2011 17" Macbook Pro running Mavericks. I'm debating on upgrading her to El Capitan for the security support from Apple till 2018. She only has 4gb of memory so I'd likely upgrade that to 8GB. She has an SSD so that's good. Just wondering if its safe to keep her on Mavericks for another two years.
She doesn't want to get a new machine mainly for the fact Apple doesn't sell the 17" screen size anymore and her machine works fine.
I've been wondering if Mavericks would run better than El Cap on my 2010 17" MacBook Pro i5/8GB with SSD.
El Cap is bearable for most of what I do with it. But the animations/scrolling are really chunky and 1080p YouTube playback in Safari gets really gummed up easily, even when it's the only thing running.
I know it's the OS because I can boot into Win 7/10 and play two 1080p videos simultaneously from YT in 2 tabs, and scrub back and forth through the videos no problem.
Would I notice an improvement in Mavericks? I can still download it in the App Store as I downloaded it in the past for the s/o's '13 MBA (on which she still runs Mavericks).
Didn't know 2010 MBPs can run Windows 10... I seriously wanna try Windows 10 to live a secret double life...