Dual monitors

I have a 2020 Macbook Air with the M1 Chip, Running Ventura 13.0


To upgrade my home office set up, I purchased a new USB-C powered docking station from the same manufacturer as my work (windows) laptop and I planned to connect 2 (identical) monitors to have a 3 screen set up while working. I decided I would also try to set up my personal laptop the same way to streamline my personal life as well.

When I connect my macbook air to the docking station both monitors connect but are mirroring each other while I have a "second" display active on the build in Retna display on the computer itself. When I go into settings to manually detect my monitors I find I am not able to search for a second monitor. Next, I tried closing my laptop's monitor thinking that would switch from the built-in display to the second of my two monitors. No. Still, both monitors are mirroring each other and I can't connect the second display. Frustrating.


Now, knowing that the machine can output 2 displays at once, I disconnected the two monitors from the docking station. Connected them both via HDMI to USB-C dongle, directly into the 2 UCB-C ports on the side of the machine. Taking up both ports on the laptop and now I have to run the whole setup on battery power alone. STILL both monitors are mirroring each other with the laptop open or closed.


I read through the developer form, I could find a single post, with 9 pages of comments from a single posta asking for help, where all the others were detailing different variations of the same problem (same exact problem I am having) going back to the creation of the thread, and as recently as 4 days ago. The even more frustrating part is that the only apple verify account to post on the thread was 3 days ago and the original creation of the thread was 1 year ago. The apple account directed users to this community form to find a solution. I wasn't able to find anything yet. But I hope that others have had the same issue and found a solution!! So many others would greatly appreciate the help.


and @apple if this is a system limitation, please just tell us! So many of us would be able to stop the frustration of only being able to use a 2 of my 3 monitors in our set ups and having no idea why, with no-one seeming to have the slightest idea where to start.

Posted on Nov 11, 2022 5:20 PM

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Question marked as Top-ranking reply

Posted on Nov 11, 2022 8:45 PM

Hi jasooooon,


Unfortunately, the M1 MacBook Air only supports one unique external display. This is a known limitation of the base M1 chip; please see the Display Support section in the tech specs: MacBook Air (M1, 2020) - Technical Specifications


The above is also true for the M2 MacBook Air: MacBook Air (M2, 2022) - Technical Specifications


The M1 Pro, M1 Max, and M1 Ultra chips each support additional external displays. The first two can be found in the 2021 14" and 16" MacBook Pros, and the last two can be found in the 2022 Mac Studio.


Now, knowing that the machine can output 2 displays at once...

This is technically correct, but the built-in display already counts as one. Basically, you can use two monitors with the M1 Mac mini, and one external monitor with the M1 MacBook Air and 13" M1 MacBook Pro.


If you absolutely need additional external displays working with the M1 MacBook Air for little to no cost, you can try DisplayLink, which uses an alternative method of sending video data to your monitors, but it isn't guaranteed to work.

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Question marked as Top-ranking reply

Nov 11, 2022 8:45 PM in response to jasooooon

Hi jasooooon,


Unfortunately, the M1 MacBook Air only supports one unique external display. This is a known limitation of the base M1 chip; please see the Display Support section in the tech specs: MacBook Air (M1, 2020) - Technical Specifications


The above is also true for the M2 MacBook Air: MacBook Air (M2, 2022) - Technical Specifications


The M1 Pro, M1 Max, and M1 Ultra chips each support additional external displays. The first two can be found in the 2021 14" and 16" MacBook Pros, and the last two can be found in the 2022 Mac Studio.


Now, knowing that the machine can output 2 displays at once...

This is technically correct, but the built-in display already counts as one. Basically, you can use two monitors with the M1 Mac mini, and one external monitor with the M1 MacBook Air and 13" M1 MacBook Pro.


If you absolutely need additional external displays working with the M1 MacBook Air for little to no cost, you can try DisplayLink, which uses an alternative method of sending video data to your monitors, but it isn't guaranteed to work.

Nov 12, 2022 8:03 AM in response to Encryptor5000

This is very helpful, it's nice to finally know that I am not missing a setting or a simple "trick" to make my second display work.


It's a little disheartening, that apple has such a serious system limitation for the only reason that I can ascertain (basied on the reaserch origanally mentioned in my post) that the reason for Apple to have this limitation is to encurage people to upgrade to the MacBook pro and Mac Studio. Capitalisum at it's finest.

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Dual monitors

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