iTunes crashes Yosemite 10.10.3 to black screen
Yosemite 10.10.3 crashes to black screen then reboots automatically when I open iTunes. This also happens when trying to open Google Chrome.
This all started last week on Friday, Apr 24th. I had been having problems updating the Pro Video 2.0.1 pack from Apple's Software Update. Then I noticed Chrome had stopped loading pages at all and after a while all open apps would freeze until crash to black screen. The only way to reboot was to unplug. This still happens with Google Chrome. I uninstalled using App Cleaner and trashed all Cache files associated with Chrome. After re-installing Chrome the same problem exists in the new install.
I then booted into Recovery Mode performing a disk and permission repair. No help after that.
I had previously fixed the Pro Video 2.0.1 update by installing them manually and my video apps now work. however Mac apps still crash Yosemite.
Running on Mac Pro (Late 2013), OS X Yosemite 10.10.3
Please help if you have similar problems with a solution.
Any help is very much appreciated in advance.
Mac Pro, OS X Yosemite (10.10.3)