Remove “MacPerformance” can’t be opened..." virus from MacA suspicious software entity called MacPerformance is a new hot topic currently trending on Mac discussion boards. Lots of users are reporting popups that appear out of the blue and say MacPerformance wants access to control Safari / Google Chrome. Activity of that sort most likely exhibits malicious characteristics. This article provides facts known on this issue thus far.
Source:
Remove “MacPerformance” can’t be opened..." virus from Mac