I know this is probably a stupid question...but I'd like to be really sure about what happens next. The computer is an early 2015 13" rMBP that came with 10.10.2 installed and is still running 10.10.2. The goal is to wipe the disk to eliminate some Adobe misbehaviors and wind up with a clean, virgin installation of 10.10.2. All the data I need is backed up and copied (both) on external drives and I've logged out of/deactivated/uninstalled programs that need that done. The Apple support pages say the following with respect to which version will be installed in OS X Recovery mode: Which version of OS X is installed by OS X Recovery? If you use the Recovery System stored on your startup drive to reinstall OS X, it installs the most recent version of OS X previously installed on this computer. If you use Internet Recovery to reinstall OS X, it installs the version of OS X that originally came with your computer. After installation is finished, use the Mac App Store to install related updates or later versions of OS X that you have previously purchased. It looks like using either the non-internet recovery method or Internet Recovery will both have the same result, a clean, virgin installation of 10.10.2 - yes/no? By the way, don't both need a wifi connection? If I use the first method, do I need to use Disk Utility to manually erase the disk first? I believe that's true, but confirmation would be great. Thanks for your time.