Have been using SKP 15 [Mac, 10.10.1, MBP late 2011 vintage] intensively the last several days. After one-two hours of use, SKP becomes unresponsive to the 3D mouse. Any regular activity e.g. saving a file, orbit, will become impossible. Activity monitor will show that kernel_task is redlined taking 23000 % CPU. Quitting SKP will release kernel_task and in a few minutes the machine becomes useable again. I’ve cleaned the system caches, run first aid, reset the preferences and it sorta works. Waiting to see if this clears up the problem.
Also SKP also crashes randomly when closing a file. Have sent in several Bug Splats