With OS 10-3-9, I selected a bad boot device. Now boot fails with msg Input not supported.
How do I get back to the boot selector screen to select the correct boot device? I have no 10.3 bootable disks.
The keyboard is connected via usb only.
This is on a Mac g4, 400 MHZ
Mac Pro, OS X Yosemite (10.10.1), 2012 Mac Pro 5,1 3.2 Ghz, 32 GB of RAM.
Hold alt key or sometimes called option key at boot up… does that give you a choice?
No, it does not. Maybe the USB ports are not active until further into the boot process?
Sure wish I had a set of 10.3 disks.
Specify exactly what computer you are referring to... G4 could be any number of systems.
Specify why/how you ended up selecting a bad boot device? Windows drive? Linux drive? What?
What did you do to your internal boot drive to make it so that it is not visible as a boot drive? Erased it? It was failing?
What device are you trying to boot into?
You don't have the recovery disks for this system?
Do you have a retail version of the OS on disk?
What happens if you disconnect the unbootable disks?
Try resetting ther PMU
Resetting PMU on Power Mac G5, Power Mac G4, Power Macintosh G3 - Apple Support
This is on the 400 MHz G4 right?
There is a PowerMac forum
The Mac is a Power PC, Model number 2.6 and the CPU is a 400 MHZ unit. The computer is also known as the Yikes board (?)
I put a CD in the cd player and went to Preferences, startup disk.
Then, stupid me, I saw the original 10.3.9 system that I had always booted on, AND another OS 2.6 on the same drive.
I selected that one and it will not start anymore. Always get the same message "Input Not Supported".
And no, I have no disks of any kind for this computer.
I did reset the PMU but it did not change anything,
Try bypassing the startup volume... power off the computer, when you restart, hold the Command + Option + Shift + Delete keys at startup and it will look for the next available volume with a valid operating system. This doesn't change the setting in Startup Disk preferences, so if it does boot, you will need to change the Startup Disk or it will try to launch the other volume again if you reboot the system.
Well, the problem has been resolved.
My thanks to each of you who contributed !
The solution was simply to reset the PRAM, where info about the boot drive and much more is stored.
Once reset, the Mac G4 boots just fine.
Again, thanks to all.
No, it did not give a choice. Thanks
Dang ! I just saw your post afterI reset the PRAM and fixed the problem
Wish I had read your post earlier. I will copy and file your suggestion for future use.
Cannot reach boot selector screen
