Can I use my Imac (2009-2010) as an external monitor for my (2020) new Imac?
I have an older iMac (2009-2010) that I would like to use as an extra monitor for my new (2020) iMac. What can of adapter can I purchase to make this work?
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I have an older iMac (2009-2010) that I would like to use as an extra monitor for my new (2020) iMac. What can of adapter can I purchase to make this work?
It will work if it's a 27" iMac, 2009 or 2010. Connect it to one of the Mac mini's USB-C ports with:
mophie USB-C Cable with Mini DisplayPort Connector - Apple
Use your iMac as a display with target display mode - Apple Support
( The "Mac from 2019 or earlier" is for Thunderbolt connection, and doesn't apply for a Mini DisplayPort 2009 or 2010 iMac.)
It will work if it's a 27" iMac, 2009 or 2010. Connect it to one of the Mac mini's USB-C ports with:
mophie USB-C Cable with Mini DisplayPort Connector - Apple
Use your iMac as a display with target display mode - Apple Support
( The "Mac from 2019 or earlier" is for Thunderbolt connection, and doesn't apply for a Mini DisplayPort 2009 or 2010 iMac.)
See this topic: Tested, iMac 2020 STILL supports target display mode with older iMacs
It only works if the older iMac has a Display Port. Using a Thunderbolt port does not work.
Your best bet is to simply buy an external display, depending on your needs they start at about $130. This is a much more trouble free solution and doesn't require expensive cabling.
Can I use my Imac (2009-2010) as an external monitor for my (2020) new Imac?