McAfee was really slowing down my Mac, and trying to figure out how to uninstall it was a pain - so I thought I'd share it as it's pretty simple.
1) Open terminal
2) Enter the following command:
sudo /usr/local/McAfee/uninstall EPM
3) Wait for it to finish - "Product has been uninstalled successfully".
4) This still leaves the agent running, so now run the following:
And finally, McAfee should be removed!
Note that if you've only done step 4 and didn't do step 2 in the right order, then you'll need to reinstall McAfee and follow the above steps in order.