With macOS Sierra installed, your Mac can determine the files you no longer need or the files you don't need locally and clear up space. The example on stage took a system with only 20GB free and cleared up 150GB free on a 250GB system.
This deletes duplicates and obsolete files like caches, duplicate downloads, old installers and items that have been in trash for more than 30 days. Other items that you don't use often, such as some documents, mail attachments, old photos and iTunes movies you've watched will be in the cloud. The files you use and an optimized version of the photo will stay on your May. On OS X El Capitan, you need to make these adjustments on your own, and track down files to delete or move.
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SYM
10/14/2016 at 10:40 am
How about performance, battery life and app compatibility?
David
10/31/2016 at 4:59 pm
Sometimes, you should just elave things alone…I cannto even download my pictures from Iphone to the MacBook Pro… Apple should have done a better job with this one…
Randall
12/05/2016 at 4:21 pm
So… a bunch of features that either a) I would never use or, b) have been using in Linux since the early 2000’s. Bravo Apple for becoming the new Microsoft… at least 15 years behind.
Jess
01/16/2017 at 6:42 am
I have been debating back and fourth to upgrade my iMac 2013 to Sierra…. Some of the apps I use no longer support Yosemite but I have found replacements for them…. other than the apps no longer support yosemite, I can’t think of another reason to really upgrade :/