Many Mac users reported in the past few weeks that a process named “mshelper” had been eating up a lot of CPU power and draining their batteries. It turns out that the process is associated with a piece of malware designed to mine for Monero (XMR) cryptocurrency.
http://feedproxy.google.com/~r/Securityweek/~3/GSKrKLzqawk/macs-infected-new-monero-mining-malware