Register FAQ / Rules Forum Spy Search Today's Posts Mark Forums Read
Go Back   MacRumors Forums > Apple Hardware > Desktops > iMac

Reply
 
Thread Tools Search this Thread Display Modes
Old Nov 8, 2010, 08:53 AM   #1
rhsauer
macrumors newbie
 
Join Date: Sep 2006
iMac won't boot from Snow Leopard Disk

I have a 27" iMac, about a year old. Yesterday, when I read a "Verify Disk" on the HD, it told me that the startup disk needed to be repaired, requiring that I boot from my Snow Leopard install disk, but the computer won't book from the disk. It just stops on a grey screen with an apple logo - no turning cog or other action. I have tried the following:

1. I tried another Snow Leopard install disk, to see if the first was faulty. The iMac still refuses to boot, so I doubt it's the optical disk itself.

2. I tried the 10.4 install disk that came with the iMac. Same problem.

3. I held down the "C" key throughout the bootup process. Same problem.

4. I held down the "Option" key throughout the bootup process. Same problem.

5. I went to Setup/Startup Disk and directed it to startup from the Snow Leopard install disk. Same problem.

6. I cleared the PRAM and the NVRAM. Same problem.

If I hold the eject button down thought the boot process, the SL install disk ejects, and the computer starts up normally, and it runs fine (except running verify disk still tells me the startup disk needs to be repaired). When the computer is running, the optical drive reads disks (including the SL install disks) just fine - it just won't boot from an optical disk.

One thing that occurs to me as I write this is that the iMac is set to start in 64 bit mode. That shouldn't matter - but I may set it to 32 and see if it helps. All updates to Snow Leopard have been installed. No non-factory ram is installed.

Any other thoughts? Help!
rhsauer is offline   0 Reply With Quote
Old Nov 8, 2010, 10:02 AM   #2
Hellhammer
Moderator
 
Hellhammer's Avatar
 
Join Date: Dec 2008
Location: Helsinki, Finland
Send a message via MSN to Hellhammer
You can make a copy of the install disc to an USB flash drive and use that

http://www.maciverse.com/install-os-...ash-drive.html
__________________
SSD Editor for AnandTech
You can also follow me in Twitter!
Hellhammer is offline   0 Reply With Quote
Old Nov 8, 2010, 11:00 AM   #3
MacHamster68
macrumors 68040
 
MacHamster68's Avatar
 
Join Date: Sep 2009
does the install disc mount on the desktop? then install and restart from there once you get ask for, btw sometimes it takes ages for the disc to load once restarted i see the apple logi on my intel iMac for ages before the turning circle comes up , so from restart to install it takes a good 10 minutes before the menu comes up asking for language settings ,dont know why that is as on my other pre intels it takes only seconds ,
if it doesn't mount try other disc as it could be the superdrive gone , hope you got apple care then,
__________________
DANGER POST MAY CONTAIN SARCASM
Intelligence does not need Intel inside,
All it needs is good sense outside.

Last edited by MacHamster68; Nov 8, 2010 at 11:15 AM.
MacHamster68 is offline   0 Reply With Quote
Old Nov 8, 2010, 01:58 PM   #4
rhsauer
Thread Starter
macrumors newbie
 
Join Date: Sep 2006
Interesting - I've probably given up at 5 minutes, thinking that if nothing happens after 5 minutes, nothing is going to happen. I'll let it go 10 minutes tonight and see if it works. Thanks.
rhsauer is offline   0 Reply With Quote
Old Nov 9, 2010, 08:36 AM   #5
rhsauer
Thread Starter
macrumors newbie
 
Join Date: Sep 2006
Well, it doesn't book from the optical disk no matter how long I wait. Again, the optical drive sees the disk just fine when OSX is booted from the HD. Any further thoughts?

(I was able to repair the problems reported with my HD using Applejack.)
rhsauer is offline   0 Reply With Quote
Old Nov 9, 2010, 08:37 AM   #6
Hellhammer
Moderator
 
Hellhammer's Avatar
 
Join Date: Dec 2008
Location: Helsinki, Finland
Send a message via MSN to Hellhammer
Quote:
Originally Posted by rhsauer View Post
Well, it doesn't book from the optical disk no matter how long I wait. Again, the optical drive sees the disk just fine when OSX is booted from the HD. Any further thoughts?

(I was able to repair the problems reported with my HD using Applejack.)
Try making a copy of the DVD to an USB drive and try booting from that
__________________
SSD Editor for AnandTech
You can also follow me in Twitter!
Hellhammer is offline   0 Reply With Quote
Old Dec 30, 2010, 08:29 AM   #7
wandal
macrumors newbie
 
Join Date: Feb 2010
Just the same here.

A few days ago I lost my "service" USB flash memory, containing Mac OS X, 10.6.5 combo updater, and mixed updaters.

So I've cloned again the Snow Leopard Install DVD (10.6.1 I suppose) on a USB flash memory. To check it out, I tried to boot from there my late 2009 iMac 27" i7 8GB (OS X 10.6.5 perfectly working), with no success.

I tried to boot from the original Install DVD, no success.

It just stops at the grey screen with the apple logo. I just press the power button, and the iMac switches off immediately (no processes hanged, it seems).

I am a little worried about it. I think the reason is in firmware updates, that brought the iMac in a newer state (as of 10.6.5) with respect to the Install DVD (10.6.1), so the boot is not feasible.

Hope somebody can explain the problem to us.
wandal is offline   0 Reply With Quote
Old Jan 4, 2011, 10:35 PM   #8
arsen32
macrumors newbie
 
Join Date: Jan 2008
Please help.

Has anyone found a solution to this problem. I have an iMac from 2008 that I am trying to upgrade to snow leopard. No matter what I try I cannot get it to boot from the dvd.

1) Holding c when booting
2) Letting it install the materials then reboot
3) Also tried using the DVD as the startup says restart using this as startup disk and doesn't do anything
4) I reset the pram and nvram

Any ideas?
arsen32 is offline   0 Reply With Quote
Old Jan 5, 2011, 02:26 AM   #9
product26
macrumors 6502a
 
product26's Avatar
 
Join Date: May 2005
My 27" 2010 imac wont boot from my snow leopard dvd because it is version 10.6.0 and the imac shipped with and requires a higher version. I can only get it to boot from the original restore dvd.
product26 is offline   0 Reply With Quote
Old Feb 26, 2011, 05:52 PM   #10
Edouard
macrumors newbie
 
Join Date: Feb 2011
I've had a problem similar to yours, but caused by something else.
My Macbook pro wouldn't boot from the disk where Mac OS X was installed, it just kept on shutting down.
I tried inserting the Mac OS X installation disk, pressing C/Alt but it kept being ejected no watter what I did.
Anyway, after hours and hours I've finally come across a solution.

1) Back up every important data you have
2) Get an Ubuntu Live CD (http://www.ubuntu.com/desktop/get-ubuntu/download)
3) Insert the live CD into your Mac, restart, and press "Alt" when you hear the startup sound
4) Boot from the Ubuntu Live CD (click on "try" not install)
5) Go to http://packages.ubuntu.com/hardy/i386/hfsprogs/download
6) Click on one of the links, then open the downloaded file with "Ubuntu Software Center"
7) While in the Ubuntu Sofware Center, search for "hfsplus" and install the package

8) Go to Applications->Accessories -> Terminal
9) Type in: "sudo gparted"
10) You will see a window come up, that is the partitioning tool
11) Select your disk
12) Click on "Device" in the upper menu -> Create a partition table
13) You will now create 2 partitions with the following characteristics.
-a) size: 200Mb, Label: EFI, Format: FAT32
-b) size: the rest of the disk, Label: Macintosh HD, Format: HFS+


/!\/!\/!\ WARNING: This will entirely erase everything on the disk /!\/!\/!\


14) Hit the green "V" (apply)
15) Let Ubuntu work its magic... then shutdown the computer and eject the disk.

16) Insert the Mac OS X installation disk
17) Press the "Alt" key when you hear the startup sound

You can now boot from the Mac OS X installation disk.
If you try to install it to the Macintosh HD drive, you will get the message "cannot be used to start up your computer".
To solve this minor issue, do the following:

1) In the upper bar, click on Utilities -> Disk Utility
2) Select the Macintosh HD partition
3) Go to the "Erase" tab
4) Select "Mac OS X extended (journaled)"
5) Type in "Macintosh HD" (or whatever name you like) in the text field
6) Hit apply
7) Quit disk utility

After doing this, you will be able to properly install Mac OS X onto the disk.

Hope this helps
Edouard is offline   0 Reply With Quote
Old Dec 16, 2011, 07:16 PM   #11
torrealta
macrumors newbie
 
Join Date: Jan 2010
USB Interference

After more trouble than I'll bore you with, the answer for me was to disconnect my USB devices.
torrealta is offline   0 Reply With Quote
Old Feb 22, 2012, 05:50 PM   #12
wickit007
macrumors newbie
 
Join Date: Feb 2012
Exclamation Before you format anything please read this

I came a cross this article (http://nookeen.wordpress.com/2012/02...en-from-a-dvd/) recently after my Mac stopped booting and it was actually the case - the hard drive cable problem!

DON'T FORMAT YOUR DISKS before you check your hardware!!!! Saved me a bunch of time restoring!!!!!

Last edited by wickit007; Feb 22, 2012 at 05:50 PM. Reason: typo in header
wickit007 is offline   0 Reply With Quote

Reply
MacRumors Forums > Apple Hardware > Desktops > iMac

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
thread Thread Starter Forum Replies Last Post
Booting is so slow: Mac OS X Snow Leopard IndianSteveJobs OS X 15 Jul 16, 2012 08:23 PM
Can't boot from Snow Leopard Disk and I really need too rxl125 Mac Applications and Mac App Store 6 Dec 17, 2011 12:17 AM
Mac mini won't boot from Snow Leopard CD numegil Mac mini 7 Dec 16, 2011 08:09 PM
Macbook Pro won't boot from Snow Leopard DVD but will from Leopard myztikal47 OS X 8 Sep 9, 2010 02:50 PM


All times are GMT -5. The time now is 11:59 PM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC