Tootfinder

I wll say, even without a visible mouse pointer, #linuxmintcinnamon is a very smooth experience on the #iMac11 and has a system app that reads my BIOS so while I can't find the boot hotkey, I can at least see I'd have no need to change it!
But this is #Xorg. As in the #XWindows GUI I've using for almost 40 years, and I know we had, once upon a time, all sorts of cute pointer mods, so if #Gnome doesn't, there must be an old-school way of simply restoring that icon.
Last time wasn't from Firefox, I'd been using the Terminal app and lost the visible pointer on exit.