Hi. It's time to upgrade the OS on my 2012 MB Pro 15. I currently have 10.10.5. Mostly, because there are sounds from Garage Band that I want to use in Logic Pro X that it seems aren't available until I at least get to El Capitan. I d/l Sierra and am ready to install. I am backing up my entire HD and cloning, making bootable via SuperDuper. I just wanted to see if there were any thoughts / suggestions or warnings on this, regarding Sierra. For example do you feel it would better to try and just go to El Capitan? Thank you sincerely for any replies. --- Post Merged, Jul 31, 2017 --- It looks like folks on the Logic Pro user group are suggesting I go to El Capitan, for better compatibility. Can you suggest please how to do this? I was able to download Sierra of course... but Apple makes installing El Capitan more difficult. Thank you for any help.