[Gimp-user] use of gimp

[michel lagueyte <eytegal gmail com>]

Hello,
Being an individual with little computer literacy, I could not find a way to pivot an image tilted backwards; 
if possible, how can this be achieved?
I'm using gimp on a 2012 mac pro with high sierra and after installing gimp version 2.10 I found many gimp 
blocks that make it unusable on my computer; would this version be incompatible with high sierra?
Thank you for bringing me answers to my questions
Very cordially.

michel lagueyte
eytegal gmail com