Currently Being ModeratedFeb 21, 2011 9:04 PM (in response to Patricia Henwood)Insert the Mac OS X 10.6 DVD, restart with the C key held down, and choose Disk Utility from the Utilities menu as soon as possible. Erase the drive, and then install the OS.
(56951)iMac Late 2007 Core 2 Duo, Mac OS X (10.6.6)
Currently Being ModeratedFeb 21, 2011 9:08 PM (in response to Patricia Henwood)You will have to use Disk Utility to erase (aka reformat - it means the same thing) your drive if you want to change from case sensitive to regular journaled. When you first boot up from the Snow Leopard DVD, choose English, then open Disk Utility from the Utilities menu. Select the internal hard drive, click the Erase button, and choose Mac OS Extended (Journaled). Reformatting will take a few seconds. When it's done, quit Disk Utility and proceed with the Snow Leopard installation.
You will lose all your data and old programs of course, when doing this. So make sure you have them all backed up first.iMac (3.06GHz Intel, OS X 10.6.6), eMac (1.25GHz PowerPC G4, OS X 10.5.8)
Currently Being ModeratedFeb 21, 2011 9:12 PM (in response to Király)Thank you both Niel and Király for your lightning responses fingers crossed that I've backed up everything I need!
Cheers2.4GHz 13inch MacBook (late 2008), Mac OS X (10.5.8), 1.42GHz G4 Mini; 12" G4 PowerBook; 500GB Lacie f/w hd; 500GB TC; iPhone 3GS
Currently Being ModeratedMay 3, 2012 4:16 AM (in response to Patricia Henwood)
In my experience one must be careful erase and reformat are different.
security options default is Do not erase data this may not be enough choose Zero out 7-pass erase
I use 35 it takes 30 to 35 hours 250 GB HD
but because when erasing one should be careful not to move or unplug the Mac
After use first Aid then Partition If you have a machine with 10.5 Bundled OS
use the 10.6 retail to erase and format and then partition into 2 or more
OS is 10 to 15 GB so you need 30 min GB for 1 Volume that is not counting Files because one should get an external HD so you always have back up when Mac fails install 10. 5 on Volume 1 and 10.6 on 2 install as new