MacBook Screen Freeze

When I use Zwift on my MacBook with a usb-c lead connected to hdmi out. The screen intermittently freezes for long periods.

MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports)
Processor - 2.3 GHz Quad-Core Intel Core i7
Memory - 32 GB 3733 MHz LPDDR4X
Graphics - Intel Iris Plus Graphics 1536 MB

If I use a separate usb-c connector for the ANT+ and the HDMI lead I can unplug the HDMI and then the screen goes black for about 10-15 seconds on both TV and MacBook, then unfreezes (on the MacBook) and I plug the HDMI back in and continue; until the next freeze in (x) minutes.

This happens every time I use Zwift without fail. It does not affect any other programs therefore it is certainly a problem with Zwift and not with my MacBook or the MacOS (this is a problem that has spanned MacOS updates).

A number of Zwift updates ago - I used Zwift without any issues on the same MacBook, same screen, same leads, same internet router and network adapters etc. This problem was introduced by one of the previous updates - however, I cannot say when it started.

This is VERY frustrating as it ruins the ergonomics of my training setup (I spent quite a lot setting it up).

Hi Michael!
I’ve been experiencing a very similar issue when a second screen is plugged via a C-USB hub with HDMI. In my case Zwift is on the MacBook Pro’s main screen and when it freezes it never unfreezes until I disconnect the C-USB cable. I see it’s been 3 months and you haven’t received a reply from Zwift.


hi, no I got no response at all - and yes it sounds like you have exactly the same issue as me. I eventually switched to AppleTV 4K and thus far all is good. I have had a couple of connection issues but that could have been wifi related. No screen freezes and back on the large widescreen via the Apple TV HDMI output. Only issue is now I have no keyboard for messages.

Good luck


Hey Michael,

I also have a 2020 13" MBP with i7 and have been experiencing the same problem for the last few months. As you said, the only solution seems to be unplugging the HDMI cable to get the display to ‘refresh’, and then reconnecting. The freezing only occurs on the actual MBP screen, and seems to happen completely randomly - could be every few seconds, minutes, or not at all (very rarely) during a ride. Despite the screen being stuck, the program continues to function with a 0 frame rate, and doesn’t stop my ride. It’s not only extremely annoying, but also difficult because I occasionally need to fiddle with cables while doing intervals or racing.

I originally thought the freezing only occurred with an external monitor connected, but confirmed yesterday that it can happen to the laptop on its own. Unfortunately, I can’t force the display to ‘refresh’ without a monitor, and Zwift ended up crashing every time rather than continuing to run with the screen frozen.

Sad we’re all experiencing this issue, but it’s reliving to know I’m not alone hahaha. Hopefully they can get a fix released soon?

Happening to me as well. 2020 13" i7 MBP, connected via USB-C to HDMI. I (like others) am relieved to know it’s not just me. I find that if I close/open the lid, it’ll “think” for a moment and then un-freeze. Hopefully the bug can be fixed quickly, but also hoping this helps for the time being. It usually happens to me on the pairing screen or ride selection screen. Sometimes in the actual world before I start riding. But I don’t think it’s happened at all while I was actually moving in a ride.