How can McAffee cause a crash on my Macbook Air after being uninstalled?

Solution 1:

Two solutions are offered by this page in the McAfee documentation: https://kc.mcafee.com/corporate/index?page=content&id=KB88461. The first solution is similar to the one in the link in IconDaemon's comment, and it didn't work for me. I have tried the second solution (boot in safe mode, and remove the listed McAfee files) and will post a comment if I continue to have the problem.