So I've been using my macbook for 2 years (bought used) and got used to the speed that it operates with. I'm a designer, using Adobe apps, working with large files all the time, I've got used to the fact that there is a little lag all the time when I'm moving around artboard, etc. But I got to use my friend's mac with exactly same setup and saw that there is no lag at all, even with much bigger files with much more layers/objects/etc. So I ran the SSD test tool from Blackmagic and my speeds are nothing close to what I see on youtube videos. Read is around 110 mbps, write goes to 400 sometimes. This is not normal, is it? Screenshots of "about this mac" and speed test app: https://www.dropbox.com/s/ei96544c5ik0mkc/Screenshot 2016-02-12 14.46.08.png?dl=0 https://www.dropbox.com/s/1wqozc25bsz73za/Screenshot 2016-02-12 14.46.27.png?dl=0 https://www.dropbox.com/s/2a2hdxheaphwixc/Screenshot 2016-02-12 14.47.16.png?dl=0 What do I do about this? Any fix? Any more advanced tests?