EtreCheck test

Hi, I just did a EtreCheck on my Mac which is running Maverick 10.9.5 and this is one of the error that come up? CPU

CVMCompiler(2) These are the processes that are currently using the majority of your processing capacity.

I have no idea where to go to fix this issue??? pls help

aslo

I was told since I have 427.77GB free out of 499.11GB I should download to OSX Captain but before I do I should set up my time machine which is something that is past due and I know I must do. I have heard from many friends that downloading to Captain they have lost all their pictures iniPhoto and some other items. Can anyone tell me if there is anything other then iPhoto I need to worry about? My my PC is slow my server is acting up and don't know why?? I haven't used a lot of any of my app's yet??

any info. is very much appreciated🙂. or am I better of driving 3 hour to a Apple store for help???

thanks feather6868