How to download MalwareBytes onto a Mac to removing Malware.
Go to malwarebytes.com/ in your browser of choice.
Hit "Free Download" and the download should start automatically and bring you to the following page (below).
Once downloaded, open the installer and follow the prompts until last step is completed.
MalwareBytes should open automatically where the only option is to Get Started.
Select Use MalwareBytes Free on the left, and you'll get a screen asking for you to allow Full Disk Access.
To do so, click on the padlock on the bottom left corner to allow changes. Enter in your admin username and password.
Then check off the box next to MalwareBytes Protection to allow Full Disk Access.
Click the padlock again to save changes.
Now you should be able to run your scans by simply hitting the Scan button in the middle.