- Apr 12, 2017 After you've enabled DVD or CD Sharing, you can use that computer's optical drive at any time. Insert a disc in the optical drive of the computer that's being shared. The disc should then be available on any Mac that's connected to the same network. On the Mac that doesn't have an optical drive, open a Finder window.
- Reboot the Mac and hold down Command+R to boot into Recovery, or hold down OPTION. Select “Recovery HD” at the boot menu. At the Mac OS X Utilities screen, select “Disk Utility” Select the boot volume or partition from the left menu and click on the “Repair” tab.
Apr 12, 2010 If your Mac has a SuperDrive or Disc drive, you can boot the Mac from any bootable DVD or CD by using a special keyboard shortcut. The bootable disc can be an OS X system restore disc, an OS X installation disc, or even a third party OS disc like Linux.
Force dismount a stuck volume | 6 comments | Create New Account
Click here to return to the 'Force dismount a stuck volume' hint |
The following comments are owned by whoever posted them. This site is not responsible for what they say.
Hi all,
What can go wrong is the same thing that can go wrong when you yank the cord on an external drive.. Any app that had files open on that drive will suddenly find that it can't read or write them anymore. What this does to the app will vary by app. You will also be leaving the filesystem on that drive in an inconsistant state, and it would be a very good idea to run First Aid against it before using it again.
- Avi
What can go wrong is the same thing that can go wrong when you yank the cord on an external drive.. Any app that had files open on that drive will suddenly find that it can't read or write them anymore. What this does to the app will vary by app. You will also be leaving the filesystem on that drive in an inconsistant state, and it would be a very good idea to run First Aid against it before using it again.
- Avi
if the volume is a read-only disk image or a CD, then you needn't worry about this.
If it will not work on different Macs then it is likely that there is a major issue with the device. This is especially prone to happen if you use a bus-powered USB hub and have multiple devices connected simultaneously. However, if the drive doesn’t work in any of your USB interfaces you need to look further to determine the problem.If another Mac is available, try connecting the flash drive to it in order to verify that the USB drive itself is not the culprit. https://cleverbite425.weebly.com/usb-drive-not-showing-up-mac-os-x.html. 2 Insufficient PowerYour flash drive may not be registering with your Mac due to an issue of insufficient power. At the risk of stating the obvious, your first move should be to try the device in an alternate USB port available on your machine.If the device works in the second port it indicates that the first port may be damaged and may need to be replaced or repaired.
I seem to have a pooched partition on my drive. I try to fix or re-format it, Disk Utility tells me that it is in use, and can't unmount it.
When I run hdiutil to try to force the eject, I get this message:
'hdiutil: detach: 'disk1s9' failed to unmount due to error 22 (dissenter -1).'
This is a big problem since it's my main OS X partition on this drive! I can't even re-partition or re-format the complete drive, since it simply won't un-mount the drive.
I run df, and it shows the volume, but fstat or lsof does not show that the volume is even in use!
I tried starting up with OS 9.2.2, but it seems to hang at startup, like it's trying to wait for this volume to open. When I have the drive in an external firewire port, I can start it up after booting, but Disk Setup says that it can't initialize it.
Any ideas how to fix this?
---
Blue Skies,
Tak
When I run hdiutil to try to force the eject, I get this message:
'hdiutil: detach: 'disk1s9' failed to unmount due to error 22 (dissenter -1).'
This is a big problem since it's my main OS X partition on this drive! I can't even re-partition or re-format the complete drive, since it simply won't un-mount the drive.
I run df, and it shows the volume, but fstat or lsof does not show that the volume is even in use!
I tried starting up with OS 9.2.2, but it seems to hang at startup, like it's trying to wait for this volume to open. When I have the drive in an external firewire port, I can start it up after booting, but Disk Setup says that it can't initialize it.
Any ideas how to fix this?
---
Blue Skies,
Tak
The following is dangerous - proceed cautiously! Backup and/or disconnect all important devices before doing this! How to clear your entire primary drive and get it ready for repartitioning: 1. Boot the Mac OS X CD (hold C) 2. Go into single-user mode (hold Option-S) 3. Run these commands: 4. Boot the Mac OS X CD (well, it happens by default now) 5. Use Disk Utility to partition the drive 6. Proceed with the installation as normal If you feel lucky, you can also edit the map (partition table) of /dev/rdisk0 interactively by just running 'pdisk' and using the prompts. Have fun, - Jake
Is invoking df really necessary? From the help screen, in Tiger:
I could not live without What's Keeping Me. You type in the name of the volume you need to eject, and it tells you which processes are 'keeping it' tied down to your system. That way, you can find the problem, and hopefully resolve it in a civilised way. Then bring out hdiutil.
While Apple has slowly phased out optical drives from it’s Mac lineup over the years, you might still have a MacBook or desktop Mac with a disc drive. You might also have an external solution with a CD/DVD/Blu-ray drive.
At some point, there’s a chance that a CD, DVD or Blu-Ray disc is going to get stuck in your Mac or external optical drive. Fortunately, there are some simple steps that can be taken to force eject a disc that’s stuck.
First, try one of these three methods: Drive hub mac os.
- Holding down the eject key
- Drag the disc icon to your Mac’s trash bin
- Right click on the disc icon and select eject
- Press Command > E
Next, try this method:
- Launch the terminal app and use the following command and then press enter: /usr/bin/drutil eject
If all else fails, you can try these methods:
Mar 12, 2020. If your Mac is using macOS Sierra or earlier, include the -applicationpath argument, similar to the way this argument is used in the command for El Capitan. Use the bootable installer After creating the bootable installer, follow these steps to use it. Step One: Format Your External Startup Disk. In order for your external device to function as a startup disk, it must be formatted as Mac OS Extended and employ a GUID partition map. To check what format your drive is using (and change it), you’ll need to launch your Mac’s Disk Utility. Format usb drive mac os sierra. Jul 02, 2020 Choose Mac OS Extended (Journaled) for any disk that you plan to use as a Time Machine backup disk or as a bootable installer. Will you be using the disk with another Mac? If the other Mac isn't using macOS High Sierra or later, choose Mac OS Extended (Journaled). Earlier versions of macOS don't work with APFS-formatted volumes. Insert the USB drive. Open the Disk Utility app. Select the USB drive and click the Erase button. Choose the Name as Untitled, Format as OS X Extended (Journaled) and select Scheme as GUID Partition Map. This option is used for all Intel-based Mac computers. Click Erase, then click Done. Format USB drive with Disk Utility. Jul 12, 2017 Why You Probably Don’t Want to Use APFS Yet. RELATED: The Best New Features in macOS Sierra (and How to Use Them) The new Apple File System is currently experimental. Apple is targeting a final release in 2017, and your Mac’s system drive–and the drives inside iPhones, iPads, Apple TVs, and Apple Watches–should automatically convert to APFS at that point.
- Boot your Mac into single-user Mode. At the prompt enter /usr/bin/drutil eject. To restart the computer enter “reboot” at the prompt without the quotation marks.
- Hold down your trackpad button (or your left mouse button) and restart your Mac. Hold the button down until the desktop appears. This will trigger the system to eject your disc before OS X begins loading.
- Shut down the Mac and restart it, then let it sit for 15 minutes. After a short amount of time, the disc may eject itself.
If your disc is still stuck, feel free to contact OWC’s customer support team for further assistance. And if you’re looking to bring optical capabilities back to your workflow, check out OWC’s lineup of optical solutions.
Google Drive Mac Os
Find more macOS tips and Quick Answers at the Rocket Yard!
Mac Os X Cd Stuck In Driver
Be Sociable, Share This!
Mac Os X Cd Stuck In Drive Time
OWC is on-site wind turbine powered at 8 Galaxy Way, Woodstock, IL 60098 | 1-800-275-4576 | +1-815-338-8685 (International)
All Rights Reserved, Copyright 2018, OWC – Since 1988