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Level 1

30 points

USB-C to HDMI adapter is fine but iMac 21" won't display anything?

I have a third-party Thunderbolt/USB-C to HDMI adapter that I tested with my Samsung to my Smart TV and it works fine. However, when I try to connect my iMac (Retina 4K, 21.5-inch, 2019 OSX 10.14.6) with my Macbook Pro (mid-2015), Macbook Air (2014) and IBM Thinkpad, it won't detect at all.

I've tried to plug it off and back in while it's on, it doesn't do anything. I've tried to clear the NVRAM/PRAM still doesn't change anything.

Help?

iMac 21.5″, macOS 10.14

Posted on Jun 6, 2021 12:18 PM

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Level 10

82,792 points

Posted on Jun 6, 2021 2:21 PM

The 2019 iMac can use an external tv or display, but it does not support being used as a display.

carefully read > https://support.apple.com/en-us/HT204592

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5 replies

Top-ranking reply

Level 10

82,792 points

Jun 6, 2021 2:21 PM in response to bett3r

The 2019 iMac can use an external tv or display, but it does not support being used as a display.

carefully read > https://support.apple.com/en-us/HT204592

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Level 1

30 points

Jun 6, 2021 2:51 PM in response to den.thed

So.... all Apple 2018 and previous years isn't computers, they're monitors?? LOL.

This is a kind of excuses why Apple keep taking away things that works before and remove features more and more every year.

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Level 1

30 points

Jun 6, 2021 2:31 PM in response to den.thed

What?? That's...ridiculous. So, I assume this goes to ALL apple monitors as well :/

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Level 10

82,792 points

Jun 6, 2021 2:41 PM in response to bett3r

The 2019 iMac is a computer not a display.

If you carefully read the article that I posted above, you will see that only some older 2009 thru 2013 iMac models could be used by another Mac.

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Level 10

82,792 points

Jun 6, 2021 3:01 PM in response to bett3r

“So.... all Apple 2018 and previous years isn't computers, they're monitors”

That is not what I said. I said that they could be “used by another Mac”

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USB-C to HDMI adapter is fine but iMac 21" won't display anything?

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