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iMac G3 はオレンジ、ブルーベリー、ライム、グレープとストロベリーといったカラーバリエーションがあります。

Creating an external SSD for my iMac G3

Guys I got an iMac G3 but the HDD is unable of be restored or something… Also the CD Drive is not working (I tried to restore from CD I burnt). I saw a video that the guy replace the HDD for a SSD with PATA/SATA adapter. Since I’m unable to install mac os 9.2 from CD, is there a way to install the mac os 9.2 into the SSD in another machine + connect in iMac and that’s it?

If yes, how?

Sorry I’m newbie into the macintech. Thanks!!

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Here’s the specs of your system iMac G3/233 Original M4984)

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You really need to get a real Apple OS-9 CD that came with the system as its setup as a bootable disk, then try your CD drive again. The other direction is to setup a bootable external drive if the original HDD is still working and boots the system (basically, acting as the CD but now we are setting up the external drive as a bootable drive. Then swap-out the HDD for your SATA-I (1.5Gbps) as I’m not sure if a SATA-II (3.0Gbps) SSD will work in this series via a PATA to SATA converter.

Look through this listing to find the OS install CD that nearest to you Macintosh OS-9 disks from eBay Marketplace

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There are two of varieties of iMac G3. If you have an original (M4984 with tray loading optical drive), your only option with a broken optical drive is to put a hard drive in another PowerPC Mac of a similar vintage and run the installer on that. Then transfer the drive into the iMac. These iMacs cannot boot via USB, and do not have Firewire. The optical drive and HDD are the only way to boot them.

If you have a later iMac G3 with a "slot loading" optical drive, you could boot the iMac into Firewire Target Disk Mode, then run the Mac OS installer on another computer connected to the iMac via Firewire. This still requires another Mac that can run the installer, and a Firewire cable. These iMacs can also boot from Firewire if you were somehow able to burn the installer to an external Firewire HDD, but most of us don't have something like that laying around.

I would try two things:

  • Re-burn your boot disk. If your source image is a .ISO or .TOAST file, you should be able to use any popular burn tool (on Windows or Mac) to write it to a CD. I've used ImgBurn on Windows for this with no issues in the past. If you're using some blank CD's that have been sitting in a closet for 20 years, try to track down a fresh one since this media does go bad over time. Also, some older Macs can be funky about reading CD-RW media, so if you have access to blank CD-R disks, use them instead.
  • Install a replacement optical drive. Once upon a time there were a lot of iMac G3's in the wild, so parts aren't too hard to find. iFixit has repair guides for the tray-loading models, and a teardown for the slot loading models.
iMac G3 Model M4984 Optical Driveの画像

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iMac G3 Model M4984 Optical Drive Replacement

難易度:

簡単

10 - 20 minutes

iMac G3 Model M5521の画像

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iMac G3 Model M5521 Teardown

難易度:

中レベル

10 - 45 minutes

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@chrisgreen - Remember a copied CD won’t have the required boot blocks which is a common problem people face with these older systems trying to get them going with a either a bad drive or trying to replace a small drive.

Here we face two issues:

- Getting a real Apple OS CD so it is able to boot the system

- Replacing the Drive

So… getting a real CD would be my first task as I bet you that’s what is stopping getting the optical drive workable as a boot drive.

If the current HDD is still workable if put back in then we can create a bootable external (FireWire) drive (if he has one)

Then with either we can boot the system up with the new drive inside to properly prep.

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Agreed, getting original install media is hard and usually expensive. It's possible to burn a disk if you have the right tools, but it isn't as simple as copying the files like you said. It needs to be a block-by-block copy. It's hard to get these vintage Macs working if you don't already have a another working vintage mac.

My usual method for doing a fresh install of the OS on one of these older machines involves putting the target in FireWire target disk mode, then booting the appropriate installer via USB on my iMac G5 (there are some tricks you can use to USB-boot those macs) and then installing on the target via firewire. Lots of steps, but it lets me preserve my original install disks for when I have no other options.

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@chrisgreen - Good plan!

The older disks are findable, I linked to one marketplace in my answer. If you look you can find a cheap original set. While wear and tear to the CD/DVD physical media can kill them, keeping them from being damaged is really all you need. While it’s been awhile using my set to boot a system it’s still working, just tried accessing it. Unlike the burnable disks these are stamped, now I do agree burnable disks don’t last as well!

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Matheus Medeiros さん、ありがとうございました!
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