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sunnycy

macrumors newbie
Original poster
Feb 12, 2022
4
2
Hi,
I have an 21.5 iMac 2011, if it is possible to use it as an external monitor for a new macbook pro or window laptop?
Many thanks!
 

Juicy Box

macrumors 604
Sep 23, 2014
7,014
8,193
The Late 2009 - Mid 2010 27" iMacs were the only ones that could be used as displays by Target Display Mode for non-Apple devices, such as a Windows PC.

The 21" and 27" Mid 2011 to the 27" Late 2013 and 21" 2014 iMacs could be used as a display by other Macs with Thunderbolt 1, 2 , or 3, via Target Display Mode, but not the M1 Macs.

Not sure why Apple did not add Target Display Mode connectivity to the M1 Macs.

Other than that, there is no HW solutions to use them as a Display.

If your "new" MBP is a M1, you could try a software solution, such as Luna Display.

A free option is Screen Sharing.

Screen Sharing is built into the OS, but there is a tradeoff between quality and low latency. You can one, or the other, but not both. I use Screen Sharing all the time, basically control 4+ Macs from one central Mac, and some of the Macs that I Screen Share with are headless.

Screen Sharing works very well depending on what you need from it. It works much better you can have a wired connection.
 

sunnycy

macrumors newbie
Original poster
Feb 12, 2022
4
2
The Late 2009 - Mid 2010 27" iMacs were the only ones that could be used as displays by Target Display Mode for non-Apple devices, such as a Windows PC.

The 21" and 27" Mid 2011 to the 27" Late 2013 and 21" 2014 iMacs could be used as a display by other Macs with Thunderbolt 1, 2 , or 3, via Target Display Mode, but not the M1 Macs.

Not sure why Apple did not add Target Display Mode connectivity to the M1 Macs.

Other than that, there is no HW solutions to use them as a Display.

If your "new" MBP is a M1, you could try a software solution, such as Luna Display.

A free option is Screen Sharing.

Screen Sharing is built into the OS, but there is a tradeoff between quality and low latency. You can one, or the other, but not both. I use Screen Sharing all the time, basically control 4+ Macs from one central Mac, and some of the Macs that I Screen Share with are headless.

Screen Sharing works very well depending on what you need from it. It works much better you can have a wired connection.
The Screen Sharing works well! Thanks a lot!
It's a pity no solution for Windows PC since most of the time need to WFH......
 
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sunnycy

macrumors newbie
Original poster
Feb 12, 2022
4
2
If you don't plan to use the Mac OS anymore, completely convert it to a monitor. Parts are available for sales, at very cheap price, considering that you only have the 21.5" 1080p panel.
It works well and I am still using it. Thank you for your suggestion.
 

pphsk

macrumors newbie
Jul 18, 2022
1
0
My mac book (m1 2021) doesn't find my old 2011 imac. I tried both with screen mirroring and with the thunderbolt cable. Does anyone know a solution?
 

Amethyst1

macrumors G3
Oct 28, 2015
8,382
9,820
My mac book (m1 2021) doesn't find my old 2011 imac. I tried both with screen mirroring and with the thunderbolt cable. Does anyone know a solution?
Thunderbolt Target Display Mode doesn't work with Apple Silicon Macs. You can try something like Luna Display.
 

pshufd

macrumors G3
Oct 24, 2013
8,833
13,665
New Hampshire
My mac book (m1 2021) doesn't find my old 2011 imac. I tried both with screen mirroring and with the thunderbolt cable. Does anyone know a solution?

Turn on screen sharing on the MacBook in Settings -> Sharing. Then go into the Finder on the iMac, select the MacBook and then click on Share Screen.
 
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