Just installed macOS Sierra on this second hand Mac mini ... it's been since Panther that I've used OSX and that was a very long time ago. Many things forgotten. First shock is how clean and polished the UI is however the "flat" look is a bit annoying. I feel a computer should be able to handle shading, 3D UI tricks and such and shows the depth of care and detail within the OS and not just gimmicks that are not really transferring efficiencies to the average user. Some things are too shocking: GarageBand - $6.99CAN ^ When the hell was this a cost?! I thought the iLife would continue without the charges and only specifics like tutoring would be charged? (I did enjoy paying for the OS upgrade back in early OSX days). Although it's still free on iOS and that has more users than MacOS. iPhoto is still free and incorporated that also was part of iLife back in the day, I guess not all of my "I" life is good enough lol. iMessage alerts are delayed. I logged on 2 days since my last use and the notification shows the message from that date, not what was recently sent to me from the same person, hmm. is this normal? all in all still feels good to be back on this platform for personal and home use vs troubleshooting Windows at work.