I upgraded to High Sierra a week ago, my MacBook Pro 2016 (15 inch) is very slow now even in normal daily usage.
I wanted to downgrade back to Sierra, but even tho my MacBook came originally with Sierra, I cannot find it in "App Store > Purchases", there is only Mavericks which I bought on my previous MacBook.
Is there any way I can download Sierra from Apple? Is there any other trustable source?
Or maybe I would see Sierra in App Store if I re-install "OS X Mavericks" again?