The terms platform and operating system mean almost the same thing. An operating system lets your computer run its most basic functions, and is the platform upon which programs like word processors or web browsers can be installed and used. Think of platform as a broader term that is the operating system and associated hardware, while operating system is more often used when referring to specific versions of an operating system.
There is a version of the McAfee Online Backup backup software that works on computers with the Windows platform.
Every operating system has a specific default folder structure. Your user profile has its own uniquely named folder in a specific location in the folder structure for your computer. Your backed up files are saved in the McAfee cloud in exactly this folder structure.
When you restore your files, you choose whether to save them onto the computer in this same folder structure or whether to save them into a different folder you specify. If the operating system and user profile of both the old and new computer are exactly identical, choosing to preserve the original folder structure when restoring is easiest.
If the folder structures are not exactly identical, regardless of whether you preserve the original folder structure or specify a different destination for your restored files, you will need to move your files into more appropriate locations.
If the new computer has an entirely different platform (Windows versus Mac), you cannot use the "replace computer" process, and you cannot restore using the backup software installed on the new computer. You can restore files only by logging in to your McAfee Online Backup account online to select files. If your account does not permit you to restore your own files, contact your administrator for assistance.