3 Replies Latest reply: May 24, 2013 8:49 PM by Linc Davis
mat0r Level 1 Level 1 (0 points)

Dear community,


Not long ago I bought an new iMac late 2012. Until now I’m pretty happy with it but I realized a problem while working with editors that the scrolling is choppy and laggy.


The problem:


When I use applications like eclipse or Dreamweaver the scrolling is totally laggy and it is very frustrating working with that. When I scroll the CPU usage goes up to 20-40 %.


But there is a difference when I change the size the texteditor window. When is very small the scrolling is very smooth like it supposed to be when is max size is very very choppy.

I made a small video to demonstrate the issue and added some monitoring. When you play it on 1080p you going to  see the values.





I think that is not ok and intended. I tried it also with other applictions and is kind of the same problem. Using Photoshop , Textwrangler or Word is alaways slow scrolling. Sometimes even dropdown lists are lagging (***?).


So far I tried this approach’s to solve the problem


  • Deleted the application caches in safe mode
  • Create a new user and tried scrolling
  • Renamed systemconfiguration folder and try after restart
  • Smooth scrolling functions and trying around options
  • Reset the PRAM


Nothing helped at all and as newbie to osx I don’t what to do else.


I would appreciate some advise

iMac, OS X Mountain Lion (10.8.3)