This is what bug and firmware fixes are for.
As nifty as the new 2015 13-inch MacBook Pro is, a number of users have logged complaints about the user interface lag in OS X Yosemite. The lag accounts for slow and choppy animations across functions like Mission Control, Launchpad, launching full-size applications, resizing windows and scrolling through web pages.
A pair of threads related to the issue have received close to 200 replies and 20,000 views within the discussion forums, with some users that previously experienced UI lag offering advice on how to resolve the problem. One potential solution involves resetting the Mac’s PRAM, while temporary workarounds listed include increasing contrast and reducing transparency under the Accessibility menu in System Preferences.


