Changing startup disk.. help

I was attempting to gain access to an old external harddrive, so I downloaded a live CD. I changed the startup disk in the system preferences and restarted my computer. To my knowledge this was a one time change, meaning it would only target my DVD drive for one boot. So I used the live CD and I can't seem to eject it from my computer. Also, I can't force it to boot from my harddrive. I know keystrokes can initiate a different boot but nothing seems to work.
Somethings I have tried:
- While turning on the computer....
- option key
- C
- eject button
- Allowing the mac to boot into the live disk and attempting to eject the disk that way
Any help would be great. Let me know if I need to provide any more details. Thanks!

randomacct wrote:
I was attempting to gain access to an old external harddrive, so I downloaded a live CD. I changed the startup disk in the system preferences and restarted my computer. To my knowledge this was a one time change, meaning it would only target my DVD drive for one boot.
that's incorrect. changing startup disk in system preferences is a permanent change, not a one time change.
So I used the live CD and I can't seem to eject it from my computer. Also, I can't force it to boot from my harddrive. I know keystrokes can initiate a different boot but nothing seems to work.
Somethings I have tried:
- While turning on the computer....
- option key
holding option should have worked. what exactly happens when you reboot holding option? it should boot you into startup disk manager.
if this does not happen, try resetting PRAM
http://support.apple.com/kb/HT1379
then try option boot again. also, what kind of keyboard are you using? you may want to try a different keyboard, preferably a wired apple keyboard.
- C
- eject button
- Allowing the mac to boot into the live disk and attempting to eject the disk that way
Any help would be great. Let me know if I need to provide any more details. Thanks!

Similar Messages

Trying to change startup disk HELP!

Using alsoft diskwarrior. Changed the startup disk in the preferences to the CD. Now, can't change it back! The computer automatically reverts to the diskwarrior software to boot from...ideas?

Restart the computer and hold the mouse button down to force ejection of the CD. The computer will then start normally. Then open the Startup Drive preference and set the startup drive to the internal drive and click on the Restart button.
In the future you don't need to change the startup disk to boot from a CD/DVD. Simply insert the disc in the optical drive, restart the computer and after the chime press and hold down the "C" key until the gray startup screen appears. Release the key when the spinning gear appears.
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Yosemite will not install and won't let me change startup disk, it's saying there is a file system problem but disk utilities can't fix it.

I Downloaded the Yosemite upgrade and went to install it on my iMac. The install failed saying file System needed repair. Ran disk utility could do the verify but the repair button was grayed out. When I tried to change startup disk back it wouldn't let me , saying it couldn't gather enough file info. So I'm stuck and can't boot my Mac. How do I get out of this?

Do a backup. Boot to the Recovery Volume (command - R on a restart or hold down the option/alt key during a restart and select Recovery Volume). Run Disk Utility Verify/Repair and Repair Permissions until you get no errors. Try to reboot normally.
OS X Recovery
OS X Recovery (2)

How to change startup disk for a 2012 Mac mini with dual HDD and clean installed with Windows 8.1?

Hi,
I have a Mac-mini (late 2012 model), originally with Mac OS X Maverick Server installed (with two HDD). Recently, I had clean installed Windows 8.1 on one of the HDD (worked perfectly, just slow) and swapped the other HDD (with Mac OSX) with a SSD. I then cloned the Windows OS HDD in to the new SSD. Now I am trying to boot this Mac mini from this SSD, however, since this Mac mini do not have BIOS for me to change the boot sequence at the startup, is there any one can help?
Thank you,
Liusc

If you boot with the Option key depressed what boot options are shown?
Also:
Restart your computer
After Windows is installed, you can switch between OS X and Windows. Use the Startup Disk preference pane in OS X, or the Boot Camp system tray item in Windows to select your startup disk, then restart your computer
How to install Windows using Boot Camp - Apple Support

Changing startup disk

Hello all,
I need to initialize my hard disk, but I can't initialize my startup disk. I bought a cdr disk with mac os 9.1, and I planned to boot up from the disk, and then initialize my hard disk. It is not working. I can't seem to boot up from the cd. Is this because it is a cdr and not a retail system cd? I also tried to change my startup disk through the apple menu but every time I restart the hard disk is still the startup disk. I am now at a loss. I would appreciate any help.

You really need a retail System CD available here - apple rescue - link. The CDR you have could be anything from an incomplete drag and drop of the system from another computer, to a defective CD, and it's not totally legal.
To be safe, buy the 9.2.1 disk. You didn't give your processor speed, but some of the 500s and 600s won't boot from any system disk under 9.2.1.
Make sure the firmware is at 4.1.9 before you do anything with OSx 10.2 or above. Don't even put the OSX disk in the machine until that firmware is updated.
David

Changed startup disk and now iMac won't boot, even to CD, can't zap PRAM

So maybe I did something really bad, but I can't imagine that I've fried my logic board, right? I changed the startup disk to an external CD/DVD drive with a linux boot CD inserted. I rebooted the computer and got just a grey screen. I decided that this computer was not capable of booting from the linux CD. Forced the power off by holding down the power button. I turned the computer back on and removed the linux CD. Now my computer will not boot at all. I get a grey screen, then after a long period, the folder with a flashing question mark.
I tried booting to my system restore CD in order to switch the startup disk back to my internal HDD, but it will not boot to CD, even when holding the 'C' button. I disconnected the external drive after trying to boot from CD using the external or internal CD drive. I tried resetting the PRAM, but the computer will not do this. I noticed that perhaps the keyboard is not being powered because I can't turn CAPS LOCK on and get a green light.
What else could I possibly try before taking a trip to the genius store? I look forward to your ideas.

So get this. I replaced the original keyboard on this computer and was just informed that only the original kybd will work for system startup commands. Since I no longer have the original kybd, the only was to switch the boot drive is use the IR remote that came with the computer, by holding the 'menu' button and using FF and RED buttons to make selection.

IMac G3 freezing after changing startup disk?

Hello.
I bought a iMac G3 I few months ago just for a hobby and have been playing around on it.
This morning I noticed two other previous system folders in the system folder.
I then opened "startup disk" (I think that is the name) and chose to restart with "Previous system folder".
When it re-booted it opened up differently, had a new background and made sound effects when clicking and scrolling.
I decided to change the startup disc to "Previous system folder1" (which is the other previous system folder)
This time when restarting it booted normally until the desktop icons loaded. The mouse and keyboard froze and then a message popped up saying "To use your internal modem you need to select the country from where you will be using your computer". I try to use the mouse and keyboard to select, "Australia" and then "OK" but as previously started the mouse and keyboard are frozen.
When booting up I can use the mouse and keyboard on the loading screen until it freezes when the desktop appears.
(The computer was working amazingly before I stupidly changed the system folder)
Why is this happening. How do I return to a previous system folder when it keeps freezing.
Here is a youtube video showing you what happens:
https://www.youtube.com/watch?v=uYURgG2W5x4
Please note, I do have all the software CD that came with computer, however for some reason discs won't work on the computer they are unrecognizable.
All keyboard commands do nothing for example holding down shift into safe mode still freezes.
Thanks in advance!
Stewart

I'm not sure what OS you are running here.
There is a way to set what os boots from the firmware. Not sure how.   Look tomorrow. let me know via another post.
For classic, you could try hold the
space bar
then booting. or is it the shift key?
If this is a slot loader, try:
The startup manager will list all of your bootable partitions then give you a choice of which to boot. Hold down the option key then power on. Continue holding down the option key until you see the startup manager. This brings up the startup manager. Click on your hd or disc. Click on right arrow key.
Restore Tiger 10.4 & Leopard 10.5 DVDs are available from Apple by calling 1(800) 275-2273. Have your serial number ready. Have your credit card ready too. There may be a small fee.
https://discussions.apple.com/thread/4720126?tstart=0 -- January 20,2013
https://discussions.apple.com/message/24588313#24588313 -- January 22,2014
gical Macintosh Key Sequences
http://davespicks.com/writing/programming/mackeys.html
http://davespicks.com/writing/programming/mackeys.pdf
Mac OS X keyboard shortcuts
http://support.apple.com/kb/HT1343
Startup keys
http://macs.about.com/od/macoperatingsystems/qt/osxstartupkeys.htm
I have a list of magical boot key sequences:
    Key Combinations-- Effect
    * mouse down -- Eject removable media ( I think Boot ROMs prior to 2.4f1 excluded the CD drive )
    * opt -- Bring up OF system picker on New World machines.
             iMac g3 400 or newer machine
    * cmd-opt -- Hold down until 2nd chime, will boot into Mac OS 9 ?
    * cmd-x (or just x?) -- Will boot into Mac OS X if 9 and X are on the same partition and that's the partition you're booting from.
    * cmd-opt-shift-delete -- Bypass startup drive and boot from external (or CD). This actually forces the system to NOT load the driver for the default volume, which has the side effect mentioned above. For SCSI devices it searches from highest ID to lowest for a partition with a bootable system. Not sure about IDE drives.
    * cmd-opt-shift-delete-# -- Boot from a specific SCSI ID # (# = SCSI ID number)
    * cmd-opt-p-r -- Zap PRAM. Hold down until second chime.
    * cmd-opt-n-v -- Clear NV RAM. Similar to reset-all in Open Firmware.
    * cmd-opt-o-f -- Boot into open firmware
    * cmd-opt-t-v -- Force Quadra AV machines to use TV as a monitor
    * cmd-opt-x-o -- Boot from ROM (Mac Classic only)
    * cmd-opt-a-v -- Force an AV monitor to be recognized as one
    * c -- Boot from CD. If set to boot to X and no CD is present, may boot to 9.
    * d -- Force the internal hard disk to be the startup device
    * n -- Hold down until Mac logo, will attempt to boot from network server (using BOOTP or TFTP)
    * r -- Force PowerBooks to reset the screen
    * t -- Put FireWire machine into FireWire Target Disk mode
    * z -- Attempt to boot using the devalias zip from first bootable partition found
    * shift -- (Classic only) Disable Extensions
    * shift -- (OS X, 10.1.3 and later) Disables login items. Also disables non-essential kernel extensions (safe boot mode)
    * cmd -- (Classic only) Boot with Virtual Memory off
    * space -- (Classic only) Trigger extension manager at boot-up
    * cmd-v -- (OS X only) show console messages during boot
    * cmd-s -- (OS X only) boot into single user mode
Did not work simply 'z'?
You could buy an external DVD drive. It needs to be firewire and bootable by Mac OS. If you have another PPC with firewire, you could try target Disk mode and installed tiger that way.
You need to figure out the level of your firmware before installing 10.2 or greater. ( The PC name for firmware is BIOS. ) Installing 10.2 with a down level firmware will most likely make your iMac unusable and difficult to fix.
What is Open Firmware?
The firmware on a PPC is called Open Firmware. Open Firmware software receives control when you poweron your machine. It does some hardware testing and some hardware configuration then passes control to your version of Mac OS.   It reside on a PROM ( program read only memory ) chip on the logic board.
Figuring out what level of Open Firmware you have?
1) Mac OS 9.x or 8.x, you need to use the Apple System Profiler.
Apple -> Apple System Profiler
2) Mac OS X, use the System Profiler.
Apple -> About This Mac
click on the More Info... tab
click on Hardware
read the Boot ROM Version
3) Open Firmware, boot into Open Firmware.
Power on your iMac while holding down command+option+o+f
The first output line contains the firmware level. Mine reads:
Apple PowerMac4,1 4.1.9f1 BootRom built on 09/14/01 at 13.18.04
Copyright 1994-2001 Apple Computer Inc.
On my machine, I have 4.1.9f1.
What firmware do you need?
http://support.apple.com/kb/HT1395
You can download the firmware from this page:
http://support.apple.com/kb/DL1283
filename: N-iMac_FWUpdate_4.1.9.smi.bin
                avoid   expanding the file on the download computer.
For a slot loading iMac, this article indicates that you need to be running 9.1 or later version of Mac OS Classic.
http://support.apple.com/kb/DL1283
"The iMac Firmware Update 4.1.9 will only run on iMac computers with slot-loading CD or DVD drives running Mac OS 9.1 or later from a local drive. If you are using Mac OS X you must boot from a local Mac OS 9.1 or later writeable partition (not a CD, or network disk) prior to following the update instructions."
You can download the Mac OS 9 updates from the Apple site.
http://support.apple.com/kb/HT1387?viewlocale=en_US
For tiger, you need 256meg of memory. A slot loader will take 1gig of memory.
You may need to get more memory.
get the 512meg card(s)
http://eshop.macsales.com/shop/apple/memory/iMac/G3_450MHz_500MHz_600MHz_700MHz
Mac OS X 10.4: System requirements
http://support.apple.com/kb/HT1514
PPC 10.4.11 combo update.
http://support.apple.com/kb/dl170

Can't change startup disk

Disk Utility reported, in bright red letters, an impending fatal hardware error on the internal hard drive in my iMac G5. I got an external firewire drive, and cloned the internal drive to the external drive.
Then, in System Preference -> Startup Disk, I select the external drive as the startup disk and restart. It then restarts -- with the internal drive.
What do I need to do to change the startup disk?

Try starting from your install disc with the clone plugged in, then select it as the startup disk.

Startup Disk help!

'your mac OS X disk has no more memory space available for application memory' keeps popping up every time i close it. i only have at most, 3 applications running, and 219.21 GB out of 319.73 GB still available on my startup disk. Help!

I am having same problem. I have 16GB RAM installed on a 27" iMac recent model. Mine will lock up completely. Here is a screen shot from Activity Monitor and also the text from the Terminal after running the above strings that were recommended. Any help will be appreciated.
Last login: Sun Feb 26 16:53:54 on ttys000
Jeremys-iMac:~ JeremyFullam$ kextstat -kl | awk '!/com\.apple/ {print $6 $7}'
Jeremys-iMac:~ JeremyFullam$ sudo launchctl list | sed 1d | awk '!/0x|com\.apple/ {print $3}'
com.openssh.sshd
org.x.privileged_startx
org.postfix.master
org.ntp.ntpd
org.cups.cupsd
org.apache.httpd
com.vix.cron
com.sharpcast.xfsmond
com.microsoft.office.licensing.helper
com.logmein.logmeinserver
com.google.keystone.daemon
com.backblaze.bzserv
Jeremys-iMac:~ JeremyFullam$ launchctl list | sed 1d | awk '!/0x|com\.apple/ {print $3}'
org.x.startx
org.openbsd.ssh-agent
com.logmein.logmeinguiagent
com.logmein.logmeingui
com.google.keystone.root.agent
ws.agile.1PasswordAgent
com.google.GoogleContactSyncAgent
Jeremys-iMac:~ JeremyFullam$ ls -1A /e*/mach* {,/}L*/{Ad,Compon,Ex,Fram,In,Keyb,La,Mail/Bu,P*P,Priv,Qu,Scripti,Servi,Sta}* L*/Fonts 2> /dev/null
/Library/Components:
/Library/Extensions:
/Library/Frameworks:
AEProfiling.framework
AERegistration.framework
Adobe AIR.framework
AudioMixEngine.framework
NyxAudioAnalysis.framework
PluginManager.framework
iLifeFaceRecognition.framework
iLifeKit.framework
iLifePageLayout.framework
iLifeSQLAccess.framework
iLifeSlideshow.framework
/Library/Input Methods:
/Library/Internet Plug-Ins:
Google Earth Web Plug-in.plugin
JavaAppletPlugin.plugin
LogMeIn.plugin
LogMeInSafari32.plugin
LogMeInSafari64.plugin
Quartz Composer.webplugin
QuickTime Plugin.plugin
SharePointBrowserPlugin.plugin
SharePointWebKitPlugin.webplugin
Silverlight.plugin
googletalkbrowserplugin.plugin
iPhotoPhotocast.plugin
npgtpo3dautoplugin.plugin
nsIQTScriptablePlugin.xpt
/Library/Keyboard Layouts:
/Library/LaunchAgents:
com.google.keystone.agent.plist
com.logmein.logmeingui.plist
com.logmein.logmeinguiagent.plist
/Library/LaunchDaemons:
com.apple.remotepairtool.plist
com.backblaze.bzserv.plist
com.google.keystone.daemon.plist
com.logmein.logmeinserver.plist
com.microsoft.office.licensing.helper.plist
com.sharpcast.xfsmond.plist
/Library/PreferencePanes:
.DS_Store
BackblazeBackup.prefPane
TiVoDesktop.prefPane
/Library/PrivilegedHelperTools:
com.microsoft.office.licensing.helper
/Library/QuickLook:
iWork.qlgenerator
/Library/QuickTime:
AppleIntermediateCodec.component
AppleMPEG2Codec.component
Google Camera Adapter 0.component
Google Camera Adapter 1.component
/Library/ScriptingAdditions:
/Library/StartupItems:
TiVoDesktop
/etc/mach_init.d:
/etc/mach_init_per_login_session.d:
/etc/mach_init_per_user.d:
Library/Address Book Plug-Ins:
Library/Fonts:
Arial
Brush Script
Times New Roman
Verdana
Wingdings
Wingdings 2
Wingdings 3
Library/Input Methods:
.localized
Library/Internet Plug-Ins:
SlingPlayer.plugin
Library/Keyboard Layouts:
Library/LaunchAgents:
com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.88A6F109-CE8C-4DAA-A0AE-253 B62027996.plist
com.google.GoogleContactSyncAgent.plist
ws.agile.1PasswordAgent.plist
Library/PreferencePanes:
MusicManager.prefPane
Library/ScriptingAdditions:
Library/Services:
Close Chrome.workflow
Close all.workflow
Thumbnailer.workflow
Thumbnails.workflow
ToastIt.service
Jeremys-iMac:~ JeremyFullam$ osascript -e 'tell application "System Events" to get the name of every login item'
iTunesHelper, SugarSync Manager, iTunes, Dropbox
Jeremys-iMac:~ JeremyFullam$

Problem changing startup disk one time

My main OS is 10.8.5 but have second hard drive with OS 10.6.8 on it for use with older applications. I've never had trouble rebooting in 10.6.8 when necessary by holding down the option key. Suddenly it doesn't work; the computer just hangs with a gray screen. Nothing has really changed in my setup in the few weeks since I've last rebooted in 10.6.8. I've verified both startup disks and repaired permissions on both.
Alfred
Mac Pro 2 x 2.4 GHz 6-core Intel Xeon
12GB RAM

Yes to both questions. Since posting my question, I tried resetting the PRAM (in 10.8.5) and the result was that the computer wouldn't start in either OS; it would just get to the gray screen and hang. I found an Apple document that suggested remedies. Starting while holding down command-R or shift didn't work. Then I unplugged all my peripherals and the computer started normally. I followed the procedure of reconnecting one peripheral at a time (rebooting each time) and didn't find the culprit. I then went to the next procedure: adding them one at a time (again rebooting each time) and this didn't find the problem either. Now I can reboot normally in either my preferred 10.8.5 or the alternative 10.6.8, but I'm a little uneasy since I don't know what the problem was and never really fixed or changed anything.

Shortcut to changing Startup Disk?

I have several installations of OS X and Windows on my system, that I frequently switch between. Is there anyway to make this quicker than opening System Preferences, clicking on Startup Disk, choosing the Disk and clicking Restart? An icon in the main menu bar would be perfect or a shortcut to the Startup Disk window.

Thanks for the tip, but that takes even longer as I have to sit and wait for the computer to find and display all the available operating systems. I like to change it in Startup Disk and then go and get a cup of coffee during the reboot. I'm just after a one-click solution to change the Startup Disk.

"Building boot caches" error when changing startup disk

Please,
Does anyone knw why, or how to fix this error? I have triedinstalling the 10.8.4 combo but keep getting "installation failed" error.
This is on my wifes brand new iMac. Here's the profile:
Hardware Overview:
Model Name:          iMac
Model Identifier:          iMac13,2
Processor Name:          Intel Core i5
Processor Speed:          3.2 GHz
Number of Processors:          1
Total Number of Cores:          4
L2 Cache (per Core):          256 KB
L3 Cache:          6 MB
Memory:          16 GB
Boot ROM Version:          IM131.010A.B05
SMC Version (system):          2.11f16
OS 10.8.4
Would greatly appreciate any assistance!!
Thank you,
Gary

Hello Mende1,
I ran both verify and repair on the 3TB internal and 4TB external HDs . . . both passed with flying colors.
I have used Techtoo Pro & DiskWarrior with no luck. I've been searching the web and there doesn't seem to be an answer. Bombich (Carbon Copy CLoner) said he felt it was a bug in startup disk selector in system preferences.
Thanks for coming to my aid.

Need startup disk help!!

I have a Core Duo Macbook and am trying to install a new (blank) hard drive. I designated my Maxtor firewire drive as my startup drive, turned the computer off, replaced the original drive with the new blank drive and when I started it up, I got a file folder with a question mark on it. Is there any way to get the firewire drive to be used right off the bat (it's already a bootable drive) or do I need to have the disktools DVD? The problem is, I'm moving and can't find the DVD anywhere. Thanks for the help!

Then it may be your cloned system wasn't good (I assume from your original post that you never actually tested the clone before removing the old drive.)
I suggest re-cloning the old drive to your external FW drive. However, this time you should:
First,
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now shutdown the computer for a couple of minutes and then restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
Second,
How to Clone Using Restore Option of Disk Utility
1. Open Disk Utility from the Utilities folder.
2. Select the backup or destination volume from the left side list.
3. Click on the Erase tab in the DU main window. Set the format type to Mac OS Extended (journaled, if available) and click on the Erase button. This step can be skipped if the destination has already been freshly erased.
4. Click on the Restore tab in the DU main window.
5. Select the backup or destination volume from the left side list and drag it to the Destination entry field.
6. Select the startup or source volume from the left side list and drag it to the Source entry field.
7. Double-check you got it right, then click on the Restore button.
For added precaution you can boot into safe mode before doing the clone.Third, boot from the clone to test it.
Replace the old drive with the new one, boot from the external FW drive and then clone back to the new drive.

I Need Startup Disk Help :(

My iMac won't start, I get a grey screen. I used the install disk to run disk repair (it said none needed.) So now I don't know what I'm doing...I'm guessing I can use the disk to start my computer? It's asking me if I want to use Mac OS X 10.4.4 Install disk, MacOS X 10.4.7 on Macintosh HD, or Network Starup. Huh? I'm guessing I should choose 10.4.7, but I really don't know what I'm doing. Can anyone help? (I'm buying AppleCare after all this!!!)

Yes, your current version of OS X will be moved to a folder called something like previous OS and a new version will be installed. It will be the OS X 10.4.4 on your install DVD and will need to be updated to 10.4.7. The Combo update can do it in one update. That will be faster than Software Update.
Here is a good site for maintaining and troubleshooting your Mac & Mac OS X;
The XLabs

Startup disk full...when it shouldn't be?

for the last week i have barely been able to use more than one application at a time. i am often unable to save things on word and when i restart my computer i am told the startup disk is almost full.
i've looked and the computer certainly thinks the startup disk is full, but there's no reason it should be. i don't have that much music or photos, no movies, only a few programs, and i've looked at how much space they all take up and it's nothing that could possible add up to filling the startup disk.
help! i'm tired of looking for things to throw away just so i can save a document. i've uninstalled office and put it back on, i've thrown out everything i don't need...but i think it might be a mistake...

Hi Sandita
It is also worth taking a look in the Console (found in the Utilities folder, within the Applications folder) log files. There may be clues in the log files as to what may be filling up the disk space - if you are sure that your applications and data files are not using much space.
15 1.25G/12 1G PBs, Mac minis, iBooks G3/G4, Mac OS X (10.4.3) Cube, TAMs, iPods 2G/4G, iPs, AEBS, AX

Changing startup disk.. help

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