Installing over Tiger

So, I've been told you can install Snow Leopard onto a desktop with Mac OS X 10.4.11 on it - is this true? I don't want to buy it just to find out I need to buy Leopard discs too.

slacker x3 wrote:
So, I've been told you can install Snow Leopard onto a desktop with Mac OS X 10.4.11 on it - is this true? I don't want to buy it just to find out I need to >buy Leopard discs too.
As others say, yes, provided that your computer meets the [requirements of Snow Leopard (SL)|http://www.apple.com/macosx/specs.html]. Many believe that buying the box set is not necessary unless your want iLife and iWork. In other words, many believe that all you need is the $29 Snow upgrade disk. This disk is a full install disk and does not require that Leopard be installed.
Here is some info on moving from Tiger to SL. [This thread describes a successful upgrade install from Tiger to Sno.|http://discussions.apple.com/thread.jspa?threadID=2185421&tstart=125] I recommend that you use the upgrade method if your Tiger install is a very good one. Otherwise, I would do an erase and install. The backup process I would use in either case is described below.
I would not upgrade to SL unless I had an external drive with a bootable clone of my internal-drive boot volume on it. I think that there is enough risk upgrading to SL that such conservatism is warranted. I would not use time machine for an installation backup; I don't trust it enough. If you do not like SL, then you can restore your internal using the clone. In doing an upgrade install, the clone is your data backup and fail-safe device. You can clone with Disk Utility, SuperDuper, or Carbon Copy Cloner. If you do an erase and install, then the clone also is your migration medium.
An upgrade install is performed by installing over your existing installation from the desktop or having started from your SL DVD. Doing so requires you to have a GUID partition. To proceed, start the installer, choose your language, start Disk Utility, make sure your partition is GUID, quit disk utility if it is and continue your installation. All your data, users settings, and apps will be present after your upgrade, except that incompatible programs will be archived in the Incompatible Software folder. It the partition is not GUID, then you will have to do an erase and install.
If you do an erase and install, then make sure your partition is GUID as described above. After you install, then you will be able to use set up assistant to migrate you data, apps, users, and settings to your new SL install. Also, if you have to make your partition GUID, then your drive will automatically be erased Mac extended (journaled). Finally, post back if you choose to do an erase and install. I have more info to provide.
You probably will want to install at least two of the optional install items on your Sno DVD, Rosetta and QT7. You can install either from the Optional Install Items folder on your on SL install DVD.
Leave your Ethernet cable, if any, in place when installing, but unplug all peripherals except those needed to install.

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