Updating mac os x
That way, you can get used to the changes while still having access to what you are familiar with.It will also make it easier to simply delete the software if you know you don't want to use Sierra at all. It's not always such a good idea to download a huge update on Day One.I want to update from Mac OS X 10.6.8 to the newest version which is mac OS Sierra.
The first thing you will want to do is find out exactly which version of the Mac operating system to install and make sure that there is no reason not to install it.
To upgrade to Sierra from, say, Mavericks, you’ll have to consequently upgrade to Yosemite and then to El Capitan first.
These OS versions can upgrade to Sierra: Disk space: 8 GB of free space on drive.
In the same About this Mac menu select "Storage" tab.
In front of the multi-colored bar, you will see the phrase, "X. XX GB." If you don't have at least 8 GB of free space, you should delete some old files.