Following a bit the recommendations we do to before installing snow leopard at appleismo and based on our experience with the upgrade process we give basically our recommendations are as follows:

1. Verify disk integrity
2. TimeMachine

Before all this, and so we are not surprised I would speak of Rosetta is a utility that your Snow Leopard when it first starts you will install, if he thinks fit, in order to enable running the Mac applications that you use that are made for PowerPC architecture.

Having said that going forward.

Check the status of your hard disk

We must verify the integrity of our system, and that everything is in place. These two processes have the time it takes to complete-a few minutes, may more than offset encounter problems later, not only during installation, but once the system is already installed. To do this we must go to Applications > Utilities > Disk Utility.

At left us lists the system disk drives, both hard drives, such as DVD drives. We select the system’s hard disk, which is usually the first.

First we will use “Verify Disk”, so we know the structure of the file system is invalid. In a few minutes will give you the results. If you find something that does not fit, we can tell you “Repair Disk”, which seek to put everything in place again.

Here are a “Repair Disk Permissions” directly (left, below image you can see a clarification), first check to repair after little use ( “repair disk”), and give directly to repair will not damage the system. This operation usually takes more than the disk check, patience.

backup with Time Machine
If you use Time Machine for some time, all you need to make sure before starting the installation of Snow Leopard, is that you have a current copy of your data. Simply make a new copy for you to have everything up to date, this process should not be too tardarte here.

If you are not accustomed to using Time Machine. Connect an external hard drive to your Mac, we recommend that the hard drive is completely empty or newly formatted. Open Time Machine panel can go to Preferences > Time Machine and assign the disk you want to go from that moment on creating backups. The first copy you make can last for hours, literally, but it never hurts to be safely backed up, I can attest that it takes, in my case it was 183 GB and takes approximately 4 hours.

Time Machine not only keeps copies of data in the previous steps have saved manually, but also applications and other elements. It is our best option since backup mac.

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