Cryptominer ‘mshelper’ malware has reared it’s ugly head once again. Once installed this malware searches your Mac for cryptocurrency. It slows your Mac down and causes high fan activity. You can get this malware even if you do not have any cryptocurrency on your Mac. This article from Intego VirusBarrier goes into detail on what this malware is and how to remove it if you do not have their VirusBarrier software.