bottom line, we have old products apple does not care about.
I had to reboot and install CS4 and too many albums last nite for 5 hours which is waste if time.
what took air drop 3 seconds to do Monday AM took 9 minutes now, and rejected the function.
I'm trough with apple, I'm sticking to what I have now and cancel buying an new iPad Pro, Apple TV and that ihome music device.
so I gave up at least Sierra works on the MBAm high on the Mac mini-life is okay Mac wise. but I has to re-install many CD because iTunes did not recognize them.
then my network was acting strange, the airport was going in and out of range.
I was advice to use a cleaner, so today I ran a maccleanner, which cleaned the Mac mini, which is must faster, no spinning ball-than I ran the cleaner on the MBA and sure enough cleaned out and set my airport better!
I rolled the dice, and reinstalled high Sierra on my MBA, which worked, after a week of trying.
finally everything is smooth as before all this annoying upgrades
shame on apple for having us go through this, and still will not ever upgrade or buy anything from them again!