And how do you fix the problem when you can't access your computer normally any more? What if you have a MacBook with a broken screen or dodgy keyboard? This will restore access to your damaged Mac so you can recover files, wipe the hard drive, and do anything else you need to do. Connect the two machines as normal, and launch your broken target Mac in Target Disk Mode.
What is Startup Disk Full on Mac OS?
Now reboot the host machine and enter Startup Manager by holding Option as your host Mac boots. This is because Target Disk Mode will only work if your drive is operational.
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Here's a troubleshooting guide to help get your external hard drive or flash drive working again. Read More , be prepared for some issues.
Damage to Thunderbolt and FireWire ports will also make this tricky, as well as logic board issues that might prevent normal operation of these ports. Your email address will not be published. Top Deals. What Is Target Disk Mode? Email Facebook Whatsapp Pinterest Twitter. Enjoyed this article? Stay informed by joining our newsletter!
Where to Find Hard Drive Icons for macOS
The Mavericks drive won't show up in Startup Disk, but shows up fine in the boot picker screen. If I am booted to High Sierra, the Mavericks drive shows in Startup Disk, but I have to shut down completely before the Mavericks drive will appear on the Option boot pick screen doesn't show up on a simple restart.
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I think it is some kind of configuration that has changed when I first installed High Sierra, when it the installer updated the Boot ROM. My Mac is a mini, and the firmware changes might affect different Macs in different ways. I haven't really investigated this too much, just what changes I have noted on my own Mac.
I'm not too bothered by it, and I know how to work around that when I reboot to another system. I have El Capitan installed on both drives.
Taz Mangus macrumors Mar 10, 3, Last edited: Jun 27, I'm trying to get it to show one for me but no go. It may take the reset to get it to work. Haven't had a chance to try. Thanks for the info. I copied and pasted to the icon in the Get Info pane, at the top left. No, it's a smart idea though, I wish that I did and it is portable. I'm not comfortable with that, I have to say.
It'll be a software issue no matter what, likely something that just needs resetting, or is in the wrong order, which would be fixed by resetting it, but I'm unsure what?
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FrancoisC macrumors a. The Catalina installer app will be in your Applications folder, so you can go there and launch it later to upgrade your Mac to the new operating system.
I used a free app called Install Disk Creator to make the installation drive. Download Install Disk Creator by clicking on the link.
Put your Mac in Recovery mode
When the download is done, you can move it over to your Applications folder. Then follow these steps to create your bootable macOS Catalina drive. Click on the menu and select your drive. If you have only the Catalina installer on your Mac, Install Disk Creator will automatically select it.
Your Mac may tell you that Install Disk Creator wants to make changes, and you need to enter your user name and password. After you do this, the app will take a few minutes to create the boot drive. A progress bar.