This is NOT a review of Parallels. The program is excellent. I want to give just a warning that protects against problems: After installing Parallels, the program offers the download of "Kaspersky for Mac", a virus protection software. This installed in Firefox (not Safari) a plug-in, which is to block access to "dangerous" sites. Unfortunately, it also blocks access to iCloud! Have 30 minutes. Used to find out and to inactivate the plug-in. Knowing this, perhaps thinking you look at the Download Kaspersky. Is in any case only a 3-month trial, but what you learn after installation.