25      iPhone_iPad_Mac_apple

Dead iMac

I'm repairing a friend's iMac.  Spec as follows: iMac 3.06 GHz Core 2 Duo 27-inch (E7600) (Late 2009) 4GB RAM, 1 TB Seagate HDD, OS 10.8

Time machine backup on 500GB WD My Passport.

Problem:

On restart, Apple logo, then progress bar, then crash.

Recovery mode showed HDD S.M.A.R.T. status: Failing

So far:

HDD replaced with new 2TB Seagate

Additional 2x4 GB RAM

Current problem:

Cannot get into recover mode

Command-R restart gives grey folder with question mark

Option restart gives Time Machine disc.  Click the disc and get grey folder with question mark

IMac's original OS X disc cannot be found so I've tried an old OS 10.6.3 Install DVD of my own.

Command-C with OS 10.6 Install DVD gives grey folder with question mark and disc ejected

Target mode on my machine recognises new HDD, GUID Partition Map.

Any suggestions?

You can not use the 10.6 Install Disc from a different system. You must use either the original Disc that came with the computer or a retail 10.6 Upgrade DVD. > Mac OS X 10.6 Snow Leopard - Apple

Many thanks.

Do I have any other option?  Is there any other way I can get the iMac into recovery mode and restore it from Time Machine?

If I have no other option, should I be buying 10.6 or a newer OS?

I never had to install 10.6 in Target Disk Mode, but it does seem possible.

see > https://www.google.com/search?q=install+snow+leopard+in+target+disk+mode

especially this user tip by abrody > Using Target Disk Mode to install an operating system

I'm hoping that I don't need to install in target mode.  There doesn't seem to be anything wrong with the hardware in the iMac.

It came with OS 10.8 and the owner has lost the disc (the 10.6 was mine).  I can buy 10.8 on disc but Apple say that I need 10.6.8 already installed.

I presume that a late 2009 iMac can run OS 10.13 now that it has 12GB RAM.  If there is no reason to avoid 10.13 on this machine, do I have to start with a new 10.6 and do sequential upgrades?

2nd thoughts.  It couldn't have come with 10.8 which wasn't released till 2012.

The owner of the iMac said that they were using 10.8 so must have upgraded.  I believe this machine came bundled with 10.6

You can try Internet Recovery, as per > How to reinstall macOS - Apple Support

But then if that does not work, you will need to start over with 10.6.

Thanks for your help so far.

I think that I have been using the appropriate disc

I can't get past the grey folder with question mark, so cannot try Internet Recovery.

I've removed the RAM upgrade with no effect.

so to summarise:

iMac 3.06 GHz Core 2 Duo 27-inch (E7600) (Late 2009) 4GB RAM, 1 TB Seagate HDD, OS 10.8

Time machine backup on 500GB WD My Passport.

Dead HDD so, HDD replaced with new 2TB Seagate.

Cannot get into recover mode

Command-R restart gives grey folder with question mark

Option restart gives Time Machine disc.  Click the disc and get grey folder with question mark

Option restart with Time Machine disc disconnected give a blank white screen with a functioning mouse, so machine is not completely dead.

IMac's original OS X disc cannot be found.  Command-C with my own OS 10.6.3 DVD shown above gives grey folder with question mark and disc ejected.

Target mode on my machine recognises new HDD, GUID Partition Map.

Try Option restart with the Retail 10.6.3 disc inserted.

If it does not open the retail 10.6.3 disk, then...

1. try installing 10.6.3 in Target Disk Mode using the other Mac, or...

2. remove the 2T hard drive, connect it to a USB to SATA adapter, connect it to the other Mac, reformat and install either OS X from Retail 10.6.3 DVD or a later later version like 10.11 from the Mac App Store.

No luck, unfortunately.

Option restart on the iMac doesn't see the 10.6.3 disc.

Putting the 10.6.3 disc in the Mac Pro gives the message:

You can't use this version of the application "Install Mac OS X" with this version of macOS.  You have "Install Mac OS X" 23.1.1.

最后更新：2017-11-19 22:19:28

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