OS X V10.7 Lion :: Can't Boot From External Drive After Upgrade
Jun 5, 2012
Prior to upgrading to Lion I used SuperDuper to create a copy of the existing internal hard drive on an new external drive (iOmega eGo 500GB). Tested booting from the external disk and it appeared to work correctly. Upgraded to Lion. Several days later attempted to boot from the external disk (by setting the start up disk in the system preferences) but it fails. The system always boots into Lion.
What I've tried: Setting the start up disk through system preferences. Holding down the option key to select a disk on startup - interestingly enough I only see the internal hard disk and a recover HD. No sign of my external disk. Using a clean partition on the external hard drive I installed SL from the retail DVD. This produces the same effect of system booting to Lion on the internal drive, which suggests that the problem is not related to the copy I made using SuperDuper, but rather has to do with the external drive or something in Lion that prevents using an external drive (but I've never heard of such a thing).
Characteristics:
Lion 10.7.4
iMac 2007
External Drive Interface FW800
Info:
iMac 24, Mac OS X (10.6.8)
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May 17, 2012
After upgrading to 10.7,4 I can no longer access my external IOMega Prestige drive. This drive is encrypted/protected via IOMega's Drive Protection software.
The following is in the kernel log after I enter the password for the drive.
[code]...
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May 24, 2012
I am trying to create an external boot drive but I can not boot to an external drive.If I mount an install disk to any drive I have it will not boot to it. If I select it in startup drive or option boot it will not work.
Info:Xcode, Mac OS X (10.7.2)
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Mar 16, 2012
I am unable to boot lion from an external drive on both a MacBook Pro mid-2009 and an iMac late 2008. Both have lion installed and I would like to boot from either a FW drive or USB key. I have reformatted both a FW drive and USB and set them to GUID and installed lion but I can only boot them to the Disk Utility App (drive shows up only as 'EFI Boot' when I hold option down).Â
The firmware is up to date and I also reset the PRAM. I am able to boot both computers from an external USB Snow Leopard drive.
Info:
iMac, Mac OS X (10.7.3), iPhone SDK
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Mar 25, 2012
I have just installed a 240GB LaCie Little Big Disk Thunderbold SSD as a boot drive for my 2011 iMac (which contains only the 7,200 prm HDD). This has improved read/write speeds dramatically. I have transferred all my data and applications to the external drive in order to see the full benefit of the SSD.
However, I had not considered Time Machine. I thought it would simply be a matter of identifying the external drive and then connecting to the Time Capsule. However, the external drive is not visible in Time Machine set up and I suspect there could be a good reason: that it is not possible.
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May 29, 2012
Internal hard drive crashed, could not repair. Lion installed on external boot drive, using Forklift to recover files. Cannot access the files of other users from internal drive. How di I change permissions on the internal old boot drive so I can recover the files? Â
Info:
Mac OS X (10.7.4)
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Dec 20, 2007
This is bad and old, and full of lessons about backing up. Anyway, internal boot drive crashed a week ago, and internal optical drive is busted. New external LaCie dvd burner works fine, but all attempts to start up from Tiger, Leopard and Diskwarrior installation disks just end up back in OS10.3 on my external LaCie FW drive. I've tried many things: unplugged everything; switched external LaCie to USB (wouldn't boot), unplugged power from internal optical drive so Mac wouldn't look there first (somebody suggested that). Attempts to start up installers from mounted DVDs result in installer screen with restart button, which, when clicked on, results in... you guessed it... boot back to dreaded 10.3 system. Night owls and westcoasters, I am up for hours yet, pulling hair.
Information:
G5 Dual 2GHz
Mac OS X (10.4.3)
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Mar 25, 2012
MacBook Pro 15" (15-inch Core 2 Duo) late 2006Â this apple macbook boot lion from usb or firewire ext hdd or usb stick which of 3 better must boot Lion on ext device? or none at all?
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Jan 10, 2010
I open the .iso file from the external drive and then it shows it as if it were the Mac OS X Install DVD. I click Install and then "Restart." It restarts and then does nothing. What do I have to do to get it to work?
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Mar 8, 2012
My internal 1TB hard drive on my iMac is dead and I don't have the money to replace it at the moment. I have everything backed up on an external 1TB drive using Time Machine. As a workaround for the time being,Is there any way I can install the system on the external drive and use that as the boot drive without erasing the Time Machine Backups? It seems to me I would have to have two partitions for the external drive, one for the system, and one for Time Machine. But is there any way to add a partition without erasing the existing one with Time Machine only on it? Â
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Apr 7, 2012
I am running OS 10.5.8 with Windows XP dual boot on my MacBook that I purchased in late 2008.Can I easily upgrade to Lion at this point without having to reinstall the Windows XP/dual boot etc?
Info:MacBook, Mac OS X (10.5.8)
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Apr 25, 2012
I have a mid-2010 13" Macbook Pro. I wanted to upgrade to 8G of ram so I bought this: url...When it arrived in the mail I installed it and booted the laptop. The apple logo comes up, the spinner starts spinning and then after awhile freezes. I figured that I recieved bad RAM so I sent it back to apple and they sent me new memory. I installed the new ram and the same thing happened again. Booting in verbose mode (Apple-V) doesn't give anything useful.This time I decided to run memory tests. I booted into single user mode (which sees 8G of memory and works fine) and ran memtest overnight. It ran 6 or 7 passes without finding any memory errors.My next plan is to try to my DVD reinstall/repair the OS to see if that will help but I don't want to do that because I would have to downgrade to Snow Lepoard and then reinstall Lion and that takes long enough to try to avoid.
Info:
MacBook Pro (13-inch Mid 2010), Mac OS X (10.7.3)
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Apr 27, 2012
Last week I finally upgraded from 10.6 to 10.7, but now my Mac Pro (2008) won't boot properly. It'll start to boot with the gray screen and the Apple logo, but then the entire screen goes gray and it just locks up there.  However, if I reboot and hold down the Option key to bring up the list of bootable drives that works fine. I've checked my Startup Drive settings and the proper drive is selected. why it won't boot on it's own anymore? Holding down the Option key is getting old.Â
Info:
Mac Pro - Octo Core, Mac OS X (10.5.6)
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Nov 16, 2010
I think it will work, but if it won't, it would be superb if someone more knowledgeable than I could tell me so
Step 1:
Buy 2.5" external Firewire 800 hard drive enclosure
Buy 2.5" SATA drive (probably 500gb WD Black or something)
Step 2:
Whack new drive into new enclosure and fire it up
Step 3:
Clone my existing 250GB internal MBP hard drive to the new one in the enclosure using Carbon Copy Cloner etc
Step 4:
Remove new hard drive from enclosure and use it to replace the internal hard drive in my Mac
Step 5:
All being well stick the old hard drive in the enclosure and use it as an external
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Mar 11, 2009
I have a mac g4 mdd 1.25 and the power supply is fried..I also have a mac g4 mdd dual 867...that works..Question...can i take the main drive from the broken mac, put it in a box ..then reboot from that external drive on my mac that works.?
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Jul 3, 2009
The loaner computer I am using is running Tiger. My clone of my computer thats in service is Leopard, every time I hold option and try to boot from the external clone it tells me this computer needs to be restarted.... can I just not boot from an external drive?
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Mar 24, 2010
I have a 21.5" iMac, I installed Snow Leopard on a external drive, but I am unable to boot from it.. I've tried pressing the option(alt) key, and the only drive that shows up is the Macintosh HD..
How do I boot from the external USB drive?
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Apr 18, 2012
I finally updated to mac OS 10.6.8 snow leopard in prep for upgrading to lion and now my macally backup drive wont mount - what should I do?
Info:
iMac, Mac OS X (10.6.8)
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Mar 26, 2012
I recently purchased a new macbook pro it has the 500gb 5400rpm drive I just wanted to know how to upgrade this drive with a samsung 256gb SSD and reinstall lion on to it? swapping the harddrive is no problem I just need help reinstalling the OS onto the new drive from the original drive.
Info:
MacBook Pro, Mac OS X (10.7)
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Mar 8, 2008
Can I boot to an .iso on a firewire drive? I've been having trouble with my disc drive lately, so this is how I'm trying to work around it
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Sep 6, 2010
I have a G4 "sawtooth running OSX 10.4.11. Is it possible to boot this mac from an external USB2.0 drive?
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Jan 11, 2009
Back on 10.5.5 and below, I was able to install Windows with Boot Camp and my External DVD Drive - My Internal SuperDrive is in the jelly and won't work. But on 10.5.6, Windows decided to give me licensing problems after I tried to use it with VMWare Fusion 2.0. So, in temper I deleted the partition in Boot Camp Assistant.
On the creation of a new, bigger partition for Windows 7 Public Beta, I found that I could no longer use my External DVD Drive to install Windows in Boot Camp.
So, now, Apple has pretty much forced me to come and get the SuperDrive fixed ($65 for a QUOTE, and Over $150 to get the thing fixed) if I want to install Windows onto my Mac.
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Mar 13, 2010
Sorry if I am in the wrong forum, as you can guess im a newbie at the forum - not at computers though (6 years experience.. )
So I have a 1TB WD Hard drive USB and I copied the Leopard Disk image and restored it onto it in a 500GB partition.
I have tried to boot it up normally by holding down Alt on start up but the drive doesn't come up. Ok.
I have tried going into the Start up Disk, it comes up and when I click on it and click restart it doesn't restart, it just does that Mac Beep thing.
I have recently just tried to boot it up manually using the Open Firmware technique. It doesn't work.
I have a PPC Mac and I know that they can't normally boot up USB Drives but the other users which I read on the thread how to boot up by the Firmware technique said they're PPC and it worked.
I just wanted to format my computer, My leopard disk is gone now but I got it copied JUST IN TIME to my Hard drive.
I formatted my computer and now i'm stuck on Tiger.
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Jun 25, 2010
I want to make a bootable clone of my iMac (PowerPC G5 running OS 10.5.8) and also backup my MacBook Pro onto an external USB hard drive so that I can restore from the external hard drive if my iMac dies (which is beginning to have startup problems).
I was planning to create 3 partitions - one for iMac's data which I'll continue to backup using TimeMachine, one for my MacBook Pro's data and one partition as a bootable clone of my iMac.
My question is.... if my iMac dies, how do I use the external hard drive to boot up from? Do I need Carbon Copy Cloner or will I be able to boot up from the external hard drive and access Apple's Disk Utility?
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Sep 5, 2009
Problem: I need to boot from an external USB optical drive with another OS's cd (linux, windows, etc) I am trying to install some other operating systems ontop of my mac, but sadly my optical drive is broken and cannot read any large DVD's, but it can read small CD's, just not blank ones. So I bought a mac compatible USB external cd/dvd drive but when I restart and hold alt, my computer does not recognize it. Extra Info: If I want to boot from OS X Snow Leopard on the external drive, it will work, but for no other cd. Including a burned version of Linux or a commercial release version of linux.
Computer Info: It is a MacBook Pro first generation, and I just reformatted and started fresh with Snow Leopard. I used the external optical drive and was hoping to have 4 OS's on it, I know how to do it, but I just cant get the install cd/dvd's to be recognized.
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Mar 15, 2012
Currently I'm upgrading from Leopard to Lion (via Snow Leopard) on both an iMac and MacBook Pro (both Intel), but before I proceed with the OSX upgrade I wanted to back everything up. Thus far I have partitioned an external firewire drive (G Drive - one that is bootable), and cloned each machine using Carbon Copy Cloner to it's own partition (both GUID). There is plenty of space left over on each partition, and is Mac OS Extended (Journaled).Â
The issue - I can boot the OS X from the external drive on the MacBook Pro but not on the iMac.
When I restart and hold down Option on the iMac the only drive that appears is the HDD, not the other two drives that are visible if I boot up on the MacBook Pro. On the iMac in System Prefs > Startup Disc I can see all 3 drives but when I select it and restart, the machine freezes on the grey loading screen and goes no further.Â
Not that it should make a difference, but there is a 3rd partition on the external drive that is currently empty (for extra storage).Â
Info:
iMac, Mac OS X (10.5.8)
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Jun 23, 2014
how I can be able to see my external hard drive? I've been using it before and was able to see it until I upgraded my OS to Mavericks....Now, I cannot find it in the finder but I can see it in the disk utility however, my mac does not allow me to do anything on it...I don't want to reformat coz I have important files in my hard drive...
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Sep 8, 2010
Can i install OSX from an external dvd drive? if yes how do i boot to an external dvd drive?
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Oct 24, 2010
I have a requirement to encrypt the whole of my boot drive and my mobile Time Machine backup drive that I shall be taking with me on travels. I know I can use FileVault, which will give me an encrypted disk image but I don't like the reliability of sparse images and need the whole of the boot drive to be encrypted. I have tried Truecrypt to encrypt the TM disk, but could not get Time Machine to see it. I've been looking at the Checkpoint Full Disk Encryption product. What I'm trying to find out is if I can encrypt a USB HD with it, but seem to be going round in loops between Checkpoint and resellers.
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Jan 24, 2007
I have a powerbook 12' 867 mghz, I know I would rather have a new one, but not ready to give up on this old gal yet! Anywhoo I thought the logic board was fried but after letting the powerbook "rest" I came back months later and sometimes it will boot but as soon as I try to do anything it freezes, so maybe the harddrive is fried? How do you get it to ignore the internal drive so it will boot from an external?
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