mac os x version 10.6 3 snow leopard system requirements

The key here is to install Lion on the newly created partition and not the default which is atop 10.6. 2) Install Mac OS X 10.7 Lion on the new partition

Now that you have the partitions squared away, we’re on to step 2. You’ll now see two partitions on your boot drive in Disk Utility, one that has your existing operating system (Mac OS X 10.6) and the newly created “Lion” partition, which is where you will install Mac OS X 10.7.

Click on “Partition” to create the partitions as indicated.

Click on ‘Apply’ to create the new partition, and you’ll see a message like this one:.

Set the partition size for Lion, I chose 20GB to make it easy.

Click on the “+” icon to add a new partition, name it ‘Lion’, or chimichanga, or whatever you want.

Click on the “Partition” tab at the top.

Select your hard drive from the left hand side.You can create a new partition on your hard drive with Disk Utility, this does not require you to reformat the drive and you should not lose any data (besides, you have that backup just in case something goes wrong, right?). Any time you edit a drives partition table or install a new operating system there is always a small chance something could go wrong, so just be safe and have a backup ready. Important: Make sure you have a backup of your existing Mac OS X installation and disk before continuing with this guide. Now I’m going to assume you already have Mac OS X 10.7 Lion downloaded ( grab Developer Preview from Apple) and ready to go, and that you’re currently running Mac OS X 10.6. You don’t have to use Lion as your primary operating system – remember it’s a developer preview and not intended for every day use.You are free to uninstall Lion at any time – without dual booting this requires a system restore from a 10.6 backup.Installing future 10.7 Lion releases will be easier.

Why do this? Having two separate installations of Mac OS X has several advantages over installing Lion atop your existing 10.6 installation (the default method), here are the primary reasons I recommend dual booting instead:

Mac os x version 10.6 3 snow leopard system requirements