Imac will not connect to 5G band but will to 2,4 G wifi

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Level 1

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Imac will not connect to 5G band but will to 2,4 G wifi

After years of stable wifi connections, my IMac has stopped connecting to the 5GB wifi band but has no trouble connecting to the 2.4 GB band. The 5GB band works fine with all my other stuff (TV, Iphone, Ipad, I Watch).

The hub seems to be working OK and I am beginning to suspect that the issue is IMac related. My Imac is a Mid 2011 model so is still using OSX 10.13.

Am I right? Do I need to install an ethernet link? If so could I use a powerline as the router is downstairs and IMac upstairs.

Any help gratefully received.

iMac 27″, macOS 10.13

Posted on Jul 22, 2023 11:35 AM

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Answer 1

Top-ranking reply

ku4hx

Level 7

23,592 points

Jul 22, 2023 12:34 PM in response to The Chief66

Unplug the power cord from your router, wait 30 seconds, plug it back in. Once it connects successfully to your modem retest access to 5 MHz band. If you can't connect still, access your router and make sure the 5 MHz band is active.

But if it's not working on a single device, I'd suspect the device.

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Answer 2

The Chief66 Author

Level 1

8 points

Jul 22, 2023 2:11 PM in response to ku4hx

Tried that and it appears to have worked. So thank you though your reply is only of the "turn it off/turn it on" kind

Often one gets so wrapped up in a problem you can forget the old tricks and overthink a problem.

Still unsure why it happened though, I mean if it can use 2.4 band why not the 5 band?

Anyway thank you again

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Answer 3

dialabrain

Level 10

125,219 points

Jul 22, 2023 1:19 PM in response to The Chief66

FWIW, we still have a 2011 iMac running High Sierra that has no problem connecting to the 5G band of our router.

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Answer 4

The Chief66 Author

Level 1

8 points

Jul 23, 2023 2:59 AM in response to dialabrain

helpful thanks- Since the IMac is so old it no longer gets OSX updates so I started to think maybe when something goes wrong it's to do with age (like so much in like and IT).

Thanks again

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Answer 5

dialabrain

Level 10

125,219 points

Jul 23, 2023 3:06 AM in response to The Chief66

You're welcome.

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Imac will not connect to 5G band but will to 2,4 G wifi

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