I am on my imac, which has a nice fast i7 processor. However, when I hold the middle mouse button and move the view around, the cube is very jittery, almost as though it is showing two cube positions at once and very rapidly moving backwards and forwards between the two. Any ideas?
I’m on OS X too (currently 10.9.5) and I also have this issue from time to time (very seldom), I can not say whether the conditions are those that Daedalus_MDW pointed out, which sounds very plausible;
what I can tell is that I have always stored the Blender folder in many different folders without any problem.
My settings differ from his in the fact that I have activated “Rotate Around Selection”, I do not know if that matters.
a)
It’s a notebook graphics solution. The iMacs are not big enough to fit a desktop graphics card. So Apple uses notebook hardware, which is smaller and produces less heat, but also offers much less performance than its desktop counterparts.
b)
It’s five years old. So, it may have been a high-end chip in 2012, but not according to today’s standards.
Unfortunately I was not able to play your screencast - I’m on Windows/Linux machines and have yet to find a video player that can handle that SCC file.
But make sure to experiment with the VSync settings in the nvidia driver: Is it off, then turn it on. Is it on, try turning it off. Without seeing the effect, I’d still say this sounds like a tearing/screen refresh issue. Changing the “Window Draw Method” in Blender’s user preferences might also help.
Just to be clear, I have noticed that you also get two cameras, grids etc.
I assume the drivers on osx automatically get updated. I am on OSX Yosemite. Its not the latest but I can’t upgrade as then my Parallels software wills top working,