3 ms·Current version does not say OS X. Just says: macOS Catalina Version 10.15.5by sevencolors 6y agoCurrent version does not say OS X. Just says: macOS Catalina Version 10.15.5xsmasher 6y agoIt changed from "OS X" to "macOS" in 2016.neximo64 6y agoYou forget X is 10 in Roman numerals. Mac OS was still OS 10.x