Question about Apple iMac G5 Desktop

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How can I load OS on imac?

I have a imac and didnt realize tehre is no operating system on it. I guess theres no bios either which sucks - I tried os dicks and computer doent recognize it - also tried putting files on flash drive - without an os this apple doesnt know what to do - WHat can i do ? Is there some way to even get a drive prompt?

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Sadly, without an OS disk, there won't be any easy way to load an operating system on this computer. What you can do though, is order a set of replacement OS disks, from Apple (1-800-MYAPPLE) And have them shipped to you. It should only be 1 or two disks, so I don't see them costing you an arm and a leg (maybe about $50 USD tops). If you can find someone that has an identical model of iMac that you have, you could try borrowing their disks.

Posted on May 10, 2009

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Posted on Jan 02, 2017

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How to boot with usb flash drive. detailed please, I'm trying to many diff ways nothing working, bios is the only thing on comp.

It is possible to boot from a USB drive....but only if the USB drive has been formatted as bootable, in the same way that OS CDs and DVDs are bootable media. You have to have an operating system either on the hard drive or on the flash drive in order to boot the computer. The BIOS is simply a "Basic Input-Output System" that interfaces the computer hardware to the OS, whatever media it is on. That is why you have to select the boot device and the boot device priority in the BIOS during setup, so it can direct itself to the bootable OS. Once you have installed an OS, then all will work fine. Until then, you will continue to have issues. Normally, with Window-based systems (you don't say what OS you are trying to use), you would insert the bootable Windows setup disk in the CD/DVD drive, ensure the BIOS was set to boot to CD/DVD first, and start the computer. The windows setup file would load itself and start the OS install process. It may even be necessary to partition and format the hard drive during this evolution, but the setup program would lead you through that as well. I have seen Windows setup files loaded to USB sticks, but they require a special process to generate so the BIOS sees the USB as bootable.

Jun 26, 2015 | ASUS Computers & Internet

1 Answer

I got a grey screen flashing a folder and other symbols on my IMAC OS X 10.5

Hi joe_shadowla, this means the Operating System has trouble finding the startup disk and the OS needs to be reinstalled. You need to have your OS X Install Disk equivalent to 10.5 or higher:
1) Insert the disk and wait for it to load to the Welcome screen
2) On the menu bar go to tools and click on Disk Utility
3) Click on your Hard Drive on the right and click on the Erase tab
4) Make sure it say (Mac OS X Extended-Journaled
5) Erase the Disk and Exit
6) Proceed with the installation and follow the onscreen instructions.

Mar 05, 2013 | Apple Mac OS X 10.0.3 Operating System &...

1 Answer

Apple imac with no operating system

Hard drive may be bad or installer disk has scratches. Replace hard drive and disk and try again.

Jan 20, 2013 | Apple iMac G5 Desktop

1 Answer

Sir i have problem in hp g61 i;m getting that message upon installing new bios. my touch pad is going crazy, so i was advised by hp to update the bios from F 0.6 to F06 f. however when i turn the computer...

never flash BIOS or risk this., only flash if
2: HP TOLD YOU the bios fixes this exact problem.
3; getting the correct bios for this pC can be difficult.
4: flashing with a dead battery can fail,
5: If the flash fails, try again. repeat the flash,
6: if the BIOS is now dead, take out coin cell for 15min.
put it back see if BIOS key works now. and reflash it using only the correct new BIOS FLASH binary files only from HP and matching
your exact unstated, service TAG data. (i bet you did not even look or get it right here, as many do , and then brick the PC)

the touch page worked when new.
so how can BIOS suddenly go bad?. (it cant)
no windows OS stated
if you are still running the correct OS on this G61.

to make the pad work takes:
1: pad not damaged or cables inside not loose.
2: correct OS, that HP supports, (windows 10 may not be)
3: only HP version and disks loaded for OS and all drivers, not microsofts.
4: remove and load the correct mouse pad from HP.
5: bingo it works and no flash needed, nor desired ever or 99.9% of all cases. leave BIOS alone and win. is my motto.

what G61, since you never said, my guess you dont know
and if true, then how'd you get the correct bios.
you didnt. (my guess and is right most times when bios mangles)
here ill click 100 for your, my wild guess.
it runs vista and w7 only, are you >? hp disks not MS?
year 2009 made.(as old as....)
see results in last photo. (guessing your unstated service tag)

btw, next time ask for mouse pad help
and leave BIOS ALONE.



Apr 30, 2017 | HP Compaq Presario C502US Notebook

2 Answers

This is a question from a friend of mine who recently was given a used imac. Any ideas what he can try doing? when I plug it in and turn it on I get a grey screen with a little icon in the middle (looks...

What your friend is seeing, is an indicator that the Mac 333 Mhz, is not able to boot up to recognizable Mac OS volume. This means that Mac OS volume is either damaged or has some how been corrupted.

Apple advises the only fixes for such an issue with this class of their "legacy computer" series is to back up the data on the hard drive if possible and reinstall the Mac OS version is was operating with, or simply go a step further and upgrade to the highest version of the Mac OS X family of operating systems, that this iMac G3 qualifies for.

Here is a link from Apple support for resolving this issue for this legacy mode;
Macintosh starts up to Grey Screen

If your friend is interested in knowing what is the highest version of Mac OS X he can install on his iMac 333,, it would be Mac OS X 10.3 Panther.

This version is the highest upgrade for the iMac 333 because Mac OS X 10.4 Tiger will only work with Macs that have a built-in Firewire port.

Here is the technical specifications link from Apple for this model:
Technical Specifications - iMac 333 Ghz (1999)

This should help.



Jan 30, 2010 | Apple iMac G3 (1999)

1 Answer

My imac os 9.1 will not reboot.

sorry but you need mac operating system cd in order to load.

Oct 02, 2009 | Apple iMac OS 9.1

1 Answer

Laptop halts as it turns on!

hi mushahid3,
I hape your labtop is ok every thing
but labtop can not load os and cannot open bios
You go to the bios setting can not press "del" you press F2 and delete key ok than you go to bios and chack hardware setting
ok thanking you

Apr 29, 2009 | Computers & Internet

1 Answer


No there isn't a way around. My advice: go back to where the yard sale was, find out whose the iMac was, and pester them to give you the password, or at least get them to change/remove it for you.

Feb 02, 2009 | Apple iMac OS 9.1

2 Answers

IMac 266 Rage Pro Won't Boot

I don't think the installer will work over a network. I think you need an actual CD of 8.5/8.6 or an external drive with the OS on it.

Dec 30, 2007 | Apple iMac RAGE PRO/233/266/333mhz Logic...

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