Once you’ve done this, connect the iMac to the iMac using the appropriate cable (we covered which one you should be using in the previous section).
To begin, boot up the old iMac and log in with a macOS user account.
#Extra monitor for imac how to
How to start target display mode and use your old iMac as a monitor However, if you’re using an iMac from 2009 or 2010 as the display, you’ll need to connect the devices with a Mini DisplayPort cable. What cable do I need for using my iMac as a monitor?įor most setups, you’ll need to use a Thunderbolt or Thunderbolt 2 cable to use the iMac as a display.
#Extra monitor for imac mac
The Mac that you’ll be using as the computer (as in, the iMac or MacBook that will be using the screen of the iMac as a secondary display) will need to be from 2019 or earlier and have macOS Catalina or earlier installed. Check the compatibility of the Mac you’ll be using as the computer You might want to consider a screen extension app like Duet Display. If your iMac is younger than 2014, we’re sorry. If the iMac is from 2011, 2012, 2013 or mid-2014, then it is compatible, provided that it has macOS High Sierra or an earlier OS installed.Īlternatively, the 24-inch and the 27-inch iMac models from 20 can also be used as an external display, provided that they have macOS High Sierra or earlier installed. Check the compatibility of the iMac for monitor useįirst, you’ll need to check that the iMac for monitor use meets the requirements for the target display mode. There are also some strange OS requirements, with more recent macOS releases not allowing access to target display mode. At the time of writing, target display mode is only available on a handful of iMacs dating back to 2009, with iMacs released after mid-2014 simply not compatible. Unfortunately, it’s not as simple as connecting a cable from a computer to a monitor. You can also use Apple’s handy web page on identifying the age of your iMac.
You can check the age of your Mac by clicking the Apple symbol at the top of your screen and then “About this Mac”. It’s only available with certain iMacs, so if the iMac you want to use as a monitor is of a certain age, it won’t work. So over on the official Apple website, this feature is referred to as “target display mode”.
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