External camera laggy - low frame rate

This isn't true at all. Lots more going on here than just webcam lag. External USB devices not recognized. Disconnecting and reconnecting (after sleeping computer) cause instability, and often full system crashes. Sure once you reboot (after connecting) then only obvious problem is webcam lag.

Sorry, that may be your experience but your presumption of the peripherals being disabled is nonsense.

The USB hubs in the monitor and attached peripherals, internal and external, are detected just fine. The issue with juddering video and audio from the camera and mic remains but the USB buses themselves are just fine under 10.15.6 as they were on 10.15.5 and earlier.

I have the same issue with the 27-inch 5K/UHD+ display on my 2016 Macbook Pro 13- inch and now have it with my 2019 16-inch (AMD Radeon Pro 5500M 8 GB / Intel UHD Graphics 630). I only notice it when using Adobe apps like Illustrator, Photoshop, and InDesign. I haven't noticed an issue with the camera.

I just upgraded from a 2016 to 2020 Macbook. Never had an issue with camera lag on my older machine and the LG Ultrafine 5k 27" monitor I use, which has a built-in webcam.

I upgraded, and now the LG's webcam is super laggy and choppy. It's unusable. The macbook's built-in webcam works just fine.

THis is a huge issue with how many video calls I'm doing these days.

Exact same issue. I was using a 2017 MBP 13" and had to upgrade to the 2020 earlier this week due to a battery issue. As soon as I began using the new computer with my 27" LG Ultrafine display, I noticed lag and frame rate issues with the camera. This never happened with my previous computer.

I've been on the phone with Apple for the past 3 days running all the troubleshooting tasks that the first poster mentioned. The case is being escalated, but the most recent specialist I talked to claimed that any followup actions are unlikely since the issue relates to a third party hardware. Super frustrating.

Is this a troll? Please stop clogging this thread with useless information. I literally restored my brand new 2020 MBP from a time machine backup (that was done from a working 2016 MBP) when I first got it....and it has never worked right. From the Catalina TM backup (again from my old working MBP) all the way to Big Sur Beta 5.

No TheLittes, there are NO drivers where this works. Not new drivers, not old drivers. There is nothing you can "reinstall" to fix this. Hopefully you haven't gotten all those points with posts that are this this far off the mark.

Can anyone confirm whether or not the issue is fixed with macOS 10.15.7? The more annoying issue for me, which I think was introduced with 10.15.6, is that macOS regularly freezes and usually also crashes when I connect it to the LG screen. It doens't happen if you first reboot the MacBook, but as soon as you disconnect it from the screen and let the MacBook sleep, macOS will crash if you try to reconnect it to the screen.

Updated to 10.15.7 and did a LG monitor software update. No change. Also the USB camera I bought to overcome this issue is not recognised as being connected if one disconnects and reconnects the MacBook or when switching between apps. One has to re-start the MacBook for the USBs connected to the monitor to be recognised. Hugely inconvenient and a real disappointment. Apple seems to have done nothing about this. Do they even read these discussions? Not sure what the point is.....

@sean1234 Off topic but what number are you using to reach support for the monitor? My monitor suddenly stopped working and I tried calling the LG service number and they gave me the number of a local refrigerator repair shop. Not impressed.

No, it is a 2020 13" MacBook Pro. I had a 2016 15" MacBook Pro and it worked great with the built in camera on the LG. Shockingly, the latest and greatest Intel MacBook Pro is failing to drive the camera properly.

Sorry Dave in SCV, it appears I confused you with "rjscored" as I thought Big Sur had helped, but reading your post again that is clearly not the case. Thanks for confirming your version anyway.

rjscored - can you tell us which version monitor you have??? Exciting that Big Sur resolved your issues, but sounds like that may be monitor version dependent. Thanks.

Hi everyone,

I also have the exact same problem and was hoping that updating to Big Sur will help. But it does not!

Everything worked perfectly with my old MacBook Pro 13" from 2016 and since I switched to the latest (Intel) MacBookPro 13" 2020, the camera on my LG Ultrafine 5K is super laggy and almost unusable in video calls.

I might have one of the earliest LG Ultrafine's (27MD5KA) bought end of 2016 / early 2017.

This issue is really annoying and I hope someone from Apple is reading this Thread. I can't imagine that this is not fixable through a software update.