Currently Being ModeratedMay 13, 2013 8:55 PM (in response to Angel Llorente)
First of all, install Mac OS X in the hard drive. If it's already installed, start the Mac, open System Preferences > Startup Disk, and choose the hard drive. Doing it, your computer will always start by default in your hard drive
Currently Being ModeratedMay 13, 2013 8:57 PM (in response to Angel Llorente)
Install an OS on it. In the case of Mac OS 9, you can also drag-copy the existing system to it and then open and close the System Folder on that drive. Moving an existing Mac OS X system requires a product such as Carbon Copy Cloner or SuperDuper.
Mac OS 9 can only start up from a drive or partition which is formatted as Mac OS Standard or Mac OS Extended. Mac OS X requires that the drive or partition be formatted as Mac OS Extended.
Currently Being ModeratedMay 13, 2013 9:13 PM (in response to Niel)
1. Can the Hard Disk I just installed be partitioned for Mac OS 9 later?
2. After I insert the Mac OS X 10.4 Tiger DVD, what are the next steps to installing Tiger onto the new hard drive?
Currently Being ModeratedMay 13, 2013 9:17 PM (in response to Angel Llorente)
1. Not without a Mac OS X 10.5 DVD, but you don't need to repartition the drive to install Mac OS 9 onto a drive which has Mac OS X installed; it can just be drag-copied from Mac OS 9. If you use a Mac OS 9.1 or earlier CD to install it instead of drag-copying it, additional steps may be needed.
2. Restart with the C key held down and specify that drive as the target.