I'm running on a high end late 2013 Retina MBP with 16 GB RAM and the i7 CPU with discreet graphics. Animations such as opening tabs in Safari, switching spaces left/right, activating Mission Control, showing desktop, etc... are all lagging a little bit and being choppy. They were super responsive and smooth in Mavericks. I'd honestly take an outdated looking GUI over choppy animations any day. Not a big deal, but it just feel slow and unresponsive, when Apple is all about making things responsive. I'd rather they make the GUI look like Windows 95 but make the animations smooth than make it look modern and unresponsive. Anyone else seeing this, and finding it irritating? Apple has always done this (Snow Leopard made animations choppy and so did Lion), it's like they fix it in one release then break it in the next... Any way to fix this? I've noticed that animations are butter smooth right after boot, and they suddenly become choppy at some point... tried disabling transparency to no avail. Are there background apps known to cause this? I usually have Skype, Dropbox, Mail, Safari and iTunes open all the time.