Macbook 12 2015 is fast with Sierra OS


macrumors 6502a
Original poster
Jul 23, 2011
I have a 2015 base model Macbook 12. Just updated it to Sierra, and it is a LOT faster than before. One can make an argument that even though it was not a clean install, the OS is still fresh. Anyways, I don't remember it being that fast ever before but will do a Time Machine back up just in case


macrumors newbie
Sep 19, 2016
What exactly is "faster" to you?

I just upgraded today as well (not clean install), on the "series 1" MacBook 12 but it seems it will be just as snappy as El Cap (MDS/Finder is indexing now so is using up some CPU)

I'll see about mission control with external monitor... so far so good

EDIT: maybe with the slightly slower mission control transitions, it will be even more snappy...?

Still, I'm very impressed how everything is just as good as before install. It took me some time to overcome trauma from my Windows days, when software upgrades tended to always slow things down, instead of making things better...


macrumors 6502a
May 3, 2015
I upgraded to Sierra today on my base model 2015 1.1Ghz MacBook and everything installed perfectly. I noticed it running quite a bit quicker as well and it seems to handle all of the user interface commands much more smoothly with transparency enabled. I love what I see so far!


macrumors 6502a
Feb 19, 2012
I have a 2015 MB and the first thing i noticed after the download was how fast it was, much snappier as they don't like us to say. Very happy, nice little update.

The only slight problem i am having is in photos, every time i scroll to the next photo there is a very slight delay for it to load properly. Basically when i flick to the next photo, it loads immediately, but after about half a second the photo gets a little bit brighter as if it is taking half a second to fully load. Anyone else experiencing this.


macrumors 6502
Jul 20, 2008
Indianapolis, IN
re: photos: I only have about 200 photos in Photos and it seems fine.

re: clean install: front page has instructions, see here:
Yeah I read that. I'm guessing you're referring to making a bootable mirror image. I did the USB method and got all ready and remember the MacBook doesn't have a USB. Ha!

I'm just going to do the update. I really haven't installed anything on the MacBook so I'm thinking it should be fine.


macrumors 68000
Sep 24, 2013
Mine seems to be faster, maybe just from the cleaning out that happens from an update. Regardless just having Siri, and Apple Watch unlocking makes it good for me. I'm still learning many of the new features.


macrumors newbie
Sep 19, 2016
After a few weeks, I am a bit disappointed. Overall it's not too bad, but switching apps with mission control on Sierra is definitely much more laggy than El Cap on my first-gen Macbook 12, and it is very annoying.. :-\