2. Click on the Downloads icon in the upper right hand corner.
3. Double-click the .dmg file once it's finished downloading.
4. Drag Malwarebytes Anti-Malware to the Applications folder.
Open Malwarebytes -> Update (software and database) first -> Scan
If you're malware-free!
If not, follow Malwarebytes' instructions to remove potentially unwanted programs from your Mac.