4 Replies Latest reply on Jul 1, 2014 10:01 PM by Chris Cox

    high cpu usage (mavericks)




      On Mavericks, I've been noticing that I'm getting a high (unacceptable) CPU% usage in Photoshop. When not even using the program and having it ran in the background, about 8-10% is taken up. This seems normal. When I do some simple strokes my CPU will bounce up to 50-80%. I have a brand new macbook 16GB ram and Samsung 840pro, so I have a hard time believing this is appropriate behavior. I have fiddled plenty with the Preferences and GPU (basic, normal, advances, off) settings in PS and none of that made a difference. I have a couple of plugin's, Kuler, etc.

      Does anyone else experience this kind of CPU drop? In Photoshop in general, or just with Mavericks? I'll state that I've noticed other programs, Chrome and Maxmsp, to be eating up some serious energy too. How is PS do in Mountain Lion. Maybe I should downgrade..


        • 1. Re: high cpu usage (mavericks)
          Samelot Level 1

          anyone having similar high CPU load on mavericks?


          What is a normal CPU % to be doing simple things in Photoshop? Like just drawing with a brush..

          • 2. Re: high cpu usage (mavericks)
            Level 7

            The only such problem I know of happens if you have color samplers active and the info palette visible.  Otherwise Photoshop's CPU usage goes down to about 1% in the background.

            While you are actively using Photoshop, the CPU usage will be higher, of course.

            • 3. Re: high cpu usage (mavericks)
              Samelot Level 1

              Haven't yet solved this problem, and am not sure if it is solvable. I found a thread (older) where people were discussing the same sort of thing:



              Yes, I do. Anyone that uses Photoshop on Mac can confirm this. For example, open Activity Monitor, switch to Photoshop, create a new document, and hold down the mouse button with for example the selection tool.


              Result? 50-100% CPU usage.


              Photoshop probably contains a lot of old, legacy code. The user interface is a real CPU hog. The programmers cannot be proud of this, and I wouldn't be surprised if the next version (CS5?) addresses this. They are going to rewrite in Cocoa, I heard.

              • 4. Re: high cpu usage (mavericks)
                Level 7

                While holdinw down the mouse, Photoshop is actively tracking the mouse and getting updates from the OS.  That has nothing to do with legacy code, and Cocoa has nothing to do with it.