Hey guys When turning on my mac it brings me to the password login, I login. My old yosemite background is back, and all I have is a flashing message which I cant even click re open or restart on "finder quit unexpectedly" Then flashing to . "Spotify has quit unexpectedly then just carrying this random pattern out. Everything's flashing and dissapearing. Unable to click anything. Cant click finder. Pretty confused as to whats going on? Any ideas?