Can a new iMac 2020 27" (Catalina 10.15.7)use my Mid 2011 27.5" ( iMac as a display? I have connected the two with the correct Thunderbolt 2/3adapter and each iMac shows connections on the Thunderbolt ports. I have the original iMac keyboard and CMD F2 does nothing. Am I wasting my time? Is there a way around Apple excluding the 2020 models if that is what they have done?
iMac 27″, macOS 10.15
Can a new iMac 2020 27" (Catalina 10.15.7)use my Mid 2011 27.5" ( iMac as a display?
No. Please refer to Use your iMac as a display with target display mode. It has been archived, so its information may no longer be applicable.
There are hardware and software requirements: "Make sure that your iMac is using macOS High Sierra 10.13.6 or earlier. You can't use target display mode with later versions of macOS, or with Boot Camp and Windows."
Can a new iMac 2020 27" (Catalina 10.15.7)use my Mid 2011 27.5" ( iMac as a display?
No. Please refer to Use your iMac as a display with target display mode. It has been archived, so its information may no longer be applicable.
There are hardware and software requirements: "Make sure that your iMac is using macOS High Sierra 10.13.6 or earlier. You can't use target display mode with later versions of macOS, or with Boot Camp and Windows."
Nope, Target Display Mode has been long discontinued.
2dfm wrote:
..... Again, I am looking for a work around...
The work around is to go to your nearest Best Buy or such and buy a new 4K display.
Thanks, for the response.
High Sierra 10.13.6 is on the target. From what I am reading it appears that Apple has ceased allowing TDM on new 2020 iMacs. I am looking to see if there is a way around this as I hate using my old iMac as a boat anchor unless I have no choice.
My definition of "long discontinued" is that Apple discontinued Target Display Mode in 2015, almost 6 years ago.
Thanks, unfortunately that is the only answer. While digging to find a solution, I found numerous other similar issues and all relate to the 2020 iMacs.
I have 2 27" 2020 iMacs, both work perfectly , whenever new Macs or verisons of Mac OS are released these forums are flooded with issues, however in almost every single case it is due to either a third party app, peripheral or a user error that is causing the problem. The 2020 iMacs are no different, however I can attest that I and millions of others have 2020's that work perfectly.
Not going to debate the issue with you. I know I am correct. But we can agree to disagree. :-)
Hi,
Which macOS did you install on target display mode iMac?
Target display mode requires macOS High Sierra or earlier on the iMac used as the external display. It does not work with macOS Mojave or later.
Depends on your definition of "long discontinued". Up until 2020 iMacs could use an old iMac (upto mid 2011 High Sierra) as a target. I am looking to see if there is a work around or do I trash my old iMac?
Not exactly true. For the target, nothing past the mid 2011systems with an OS after High Sierra 10.13.6 will work. But for the primary systems up until 2020, TDM worked with thunderbolt connections to the aforementioned older systems . Again, I am looking for a work around, if possible, which appears to not be the case for the new 2020 iMacs.
Target Display Mode
