I just put 2new harddrives n my g4mac desk top.how do i reboot my sytem.i have a startup disk for mac and tiger x disk cant get them to work

Hi Jan,

If you see a spinning grey earth globe, then it's an easy fix.
Starting from a shut down mac, press the start up button then immediately press and hold the Alt button until you see your startup disk appear, release the Alt button, ... select your startup disk and then hit return. The mac should boot up normally.

then immediately go into the System preferences and choose the StartUp Disk icon and make sure you select your harddrive as the start up disk. somehow, network disk was selected and it is timing out looking for it...

plees change your hard disk the mechine is of nooo use

Trying booting from the Mac OS X install disc. insert the disc while holding the "option" key on the keybaord select the Mac OS X disc. once it has started select the Utilites from the menu bar from there you will see a "Reset Password.." select the hard drive select the user account enter password reenter the same password give yourself a hint to the password
at the bottom reset the "Home Folder Permissions and ACLs"
click save
reboot the same way, holding the "Option" key select the hard drive enter the password for the account you just made
once you have booted into the system go to: Apple menu (top left) > System Preferences > Startup Disk
make sure that you have your hard drive selected this makes it so after a reboot it will boot from the hard drive and not a disc.

Hi,

There could be many known issues related to the blue screen. I would have mentioned few steps in this mail but i rather provide you with the steps guiding to online website.

Click on the Troubleshooting link and follow the steps accordingly :
Troubleshooting Link

Also, Try this step below as well

1) Put in the install CD that came with your Mac, reboot, hold down the letter C after you hear the chime, and when it boots to the installer, pick a language, and then run Disk Utility by finding it in the top menu.

2) Instead of holding down C at startup, hold down the letter D and make sure all your hardware's okay.

Did you use a system specific install of Tiger (OS X 10.4)? If so, you need to use the retail version of the OS so it will work across the board with all Macs.

What happens when you boot up? Do you get the flashing ? Folder icon or does it freeze on the apple logo or something else? Try starting in safe mode (startup while holding 'Shift' key) and see what happens.
If problems persist -
Next force the internal hard drive to be the startup disk (reboot holding 'D')
Still having problems? Try resetting PRAM (reboot & press Cmd+Opt+P+R. Hold until you hear 2nd chime)... see what happens, if no success do the NVRAM (reboot & Cmd+Opt+N+V)
If all that fails let us know and we'll look at the next level of options

See if it will boot while holding down the shift key. This is a safe boot without any startup items and it automatically runs a disk repair.

Once booted open Disk Utility (found in application\utilities) and run Verify Disk to see if the repair was successful.

Hello, To choose a startup disc, press the alt ket at startup, and you will see a list of disks to start on Best regards

Hi, Sorry to hear you are having problems,
YES, Yes there is a way to get out of that loop.

1. Shut down your Mac by holding down the power on button for 5 seconds or so..
2. Power on your Mac and VERY QUICKLY press down on the mouse button and hold it down until your CD ejects.
3. Now, insert your Disk 1 and reboot the Mac on this installer disk and don't forget to choose option 2 disks only...
4. Voila!

If you have the install disk, restart the Mac and hold down the C key after you hear the startup chime. This will start from the CD. Under the Installer menu, you will then have the option to reset the password for the admin account, which will enable you to reset any user password.
Instructions from Apple are here: http://kb.wisc.edu/helpdesk/page.php?id=3853