16' MacBook Pro not able to activate Target Display Mode on iMac 2013. Activate display MacBook Target. Previous post. Why does icloud show the wrong OS for my device. ICloud Problems. Related posts. Use Mac to create SAN or PAN for Alexa devices- dots & echo. Make sure that the iMac you're trying to use as a display supports Target Display Mode. Target Display Mode works only when your primary Mac is logged in to a macOS user account. For example, if your first Mac is at the FileVault login screen, pressing Command-F2 on your iMac does not enable Target Display Mode.
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If you've encountered a problem with macOS, the solution might be to reinstall the system on your Mac. This can be done by any Mac owner, but it can be a little bit complicated. You'll need to put your Mac into macOS Recovery, which gives you tools to diagnose problems on your Mac, as well as reinstall the operating system.Here's how to reinstall macOS using Recovery mode.Entering macOS RecoverymacOS Recovery has tools at its disposal that allow you to diagnose problems with your Mac's hard drive, reinstall macOS, and restore from a Time Machine backup. You can enter Recovery by pressing certain key combinations. The combination you choose will determine which version of macOS will be installed on your system when you select Reinstall macOS.
Press Command - R to install the latest version of macOS that was installed on your Mac without installing a later version. Press Options - Command - R to upgrade to the latest version of macOS that's compatible with your Mac. Press Shift - Option - Command - R to install the version of macOS that came with your Mac, or the version closest to it that's still available.How to check your startup disk with Disk Utility in macOS Recovery modeThe first thing you'll want to do is make sure your Mac's startup disk is healthy. You'll need to use Disk Utility to do that. Click Disk Utility when in macOS Recovery.
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Click Continue. Click on your Mac's startup drive in the Disk Utility sidebar. It should be the drive at the top of the sidebar if there are multiple drives. Click First Aid. Click Run.
First Aid will run, checking the health of your Mac's drive. This process could take a little while. Click Done.
Click Disk Utility in the Menu bar. Click Quit Disk Utility.How to erase your startup disk in macOS Recovery modeIf you need to start completely fresh, then you'll want to erase your startup disk using Disk Utility. If you want the content on your Mac to stay intact, skip to the. Click on your startup disk in the Disk Utility sidebar.
Click Erase. Click the Format drop-down menu. Click on the format you want to use for your drive. If you're running macOS High Sierra or later on a Mac with an SSD, your choices will be some form of APFS. Click Erase.
Your drive will proceed to be erased.How to reinstall macOS while in Recovery modeThe next step is to reinstall macOS. Click Reinstall macOS. Click Continue. Click Continue. Click Agree. Click Agree. Click on the drive on which you wish to install macOS.
Enter your Apple ID and password if you're asked to, though you might not be. Click Install.Your Mac will now go through the normal macOS installation process, eventually restarting.
If you're starting from scratch, you'll need to set up your Mac from scratch.Questions?If you have any more questions about reinstalling macOS on your Mac, let us know in the comments.Updated December 2019: Everything is up to date through macOS Catalina.
I have a Mac mini Server 2011 with a single thunderbolt port. It is connected to a G-Raid with Thunderbolt (no USB). The second Thunderbolt port on the G-Raid has a miniDisplayPort cable to a mid 2010 iMac that supports Target display mode. When I activate the TDM screen sometimes there is interference on the iMac display. The interference is intermittent. Sometimes none, sometimes a lot.
It doesn’t seem to have anything to do with disk access on the G-raid. It even occurs with the G-raid powered off. I tried using another Mac as the source and the problem still occurs so it isn’t the Mac mini Server. I tried a new apple thunderbolt cable and the problem occurs. If I cable directly from the Mac mini server to the iMac, no interference.So it is the G-raid device’s thunderbolt ports daisy chained that seems to be the problem.
I tried swapping the order of the cables, no difference, it still has interference. Anyone have any ideas or suggestions? Thanks for the response. I did use a newer iMac as the video source ( instead of the older Mac mini server) and had the same problem.
So that is why I believe it is the G-raid, generating interference. I don’t have another mini display port capable display to check, but since there is no interference with the non daisy chain connection I don’t think it is the iMac being used as the display.It is an old device well past warranty, but I was hoping someone else had seen the problem and might have some solution I hadn’t thought of yet.
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