I have an ancient ipad that is still functional but stuck on iOS 9. Xcode doesn't let you target that version anymore. Is it still possible to compile an ipa for devices out of support?
On Apple x86 hardware: Running Windows in VMWare Fusion works very, very well. I can’t see a reason why that wouldn't also be the case for old versions of OS X, though admittedly I haven’t tried.
It’s curious to me that OS X in VirtualBox is sluggish. Both VMWare Fusion and VirtualBox use virtualization…