SourceAdd
While browsing safari my screen froze and an app appeared "SourceAdd". Is this a normal app or part of the computers programs? I have never seen it before.
Thanks.
MacBook Air
That isn't a normal app or part of the computer's programs.
You may have adware/malware installed. Try downloading this program which was written by Thomas R, a long time poster. The program will search for malware/adware. The program will do the work for you which makes it easy. It may be necessary to run more than one scan. After running the scans, restart the computer.
Malwarebytes Anti-Malware for Mac 10.10 and later