Xcode.appand/or place it in a different dir
xcode-selectinternally; not sure)
Xcode_11_5.appor whatever. then install another Xcode. if you install Xcode from the App Store, you want to rename first. if you download Xcode from https://developer.apple.com/download/more/, you can just drag & drop it in the Finder and rename it there
is there any way to force newer versions of Xcode to run on older Mac OS X versions? What is the basic reason why Xcode 11 can't run on, say, High Sierra?
in some cases, you can hack the
Info.plist to make apps run on unsupported OSes. however, with something like Xcode, it's likely to rely very deeply on new system framework that simply aren't there.