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Usb port stops working after a while on new 2020 mac book pro13, mac OS catalina 10.15.4

I've tried a couple of dongles, including apples own usb-hdmi-usb-c dongle, to connect my hdmi and mouse via usb, however after about 2 hours of use, the usb port just stops responding and my mouse is no longer able to talk to the laptop.

The hdmi port seems fine and there is no issue with the secondary screen connection, but I need to un-plug and plug the dongle back into the laptop's usb-c port in order to get the usb port to respond and use my mouse again.


Until I reconnect the dongle, it doesn't matter what device I plug into the usb port.


What do to?

MacBook Pro 13″, macOS 10.15

Posted on May 26, 2020 7:13 AM

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38 replies

Jun 17, 2020 6:52 AM in response to klaas226

@klass226 It is similar with me. Although I'm plugged directly macbook power adaptor, my dongle only starts to work again if I unplug it completely or if I put the laptop to sleep and then wake it up it. Simply unplugging the usb adaptor for the mouse from the dongle does absolutely nothing.


It is mighty strange. You'd think Apple would not this issue so far into the game.

Jun 17, 2020 6:52 AM in response to klaas226

Ok, well I have a swap that is due to arrive on the 23rd of June. I will try that machine with excactly the same set up and report back.


This is taking up so much of my time to troubleshoot. I've had too much faith in Apple products that I've doubted my own equipment first.


If you have any improvements or discover anything else, please feel free to pop it in here.

Jun 18, 2020 1:12 AM in response to Semazas

Yup, also found this reddit post of someone who has found a workaround, but it doesn't fix the underlying issue. Is apple trying to force us to move away of accessories that us USB 2.0 devices, or have they in their rush to get a new product out, not done their proper tests. The fact that this user also states that Apple has not received any other complaints regarding this issue, makes me wonder that Apple is trying to cover their backs.


I use this laptop as my personal work laptop. Having to reset everything weeks after I have just bought it brand new would **** me off big time, so would having spent $80 on their official dongle to plug my mouse and screen into, only to find out that it doesn't solve my issue.


https://www.reddit.com/r/mac/comments/gp5b1z/usb_20_issues_on_new_macbook_pro_13_2020/

Jun 22, 2020 1:55 AM in response to klaas226

So one guy managed to "fix" his issue by getting the CalDigit TS3 Plus dongle. It's an expensive and hefty dongle (calling it a dongle is wrong. It's more like a hub, and is not something that you want to carry around with you), but it handles the usb type for the mac and sends your usb2 accessories as usb3 to the mac, tricking it.


I've in the meantime bought one myself and have been using it since Friday 19th June, and so far my mouse has not disconnected.


I have to say though that I am not happy that I needed to buy a $230 peripheral in order to the my new $2300 macbook pro to stop disconnecting my mouse. On top of that I had initially bought the $80 Apple dongle.


I wonder if apple will give me a refund of $230 for the fact that their top of the range machine doesn't work out of the box.


I really do hope that this is a software issue and not a hardware one and that it can be resolved in a later software update. I would hate to have to send my laptop back and disrupt my workflow because of bad pre-sales testing on apple's part.

Jun 22, 2020 2:10 AM in response to hyprstack

I've read about this. Bit of an expensive fix.


One thing I am really struggling to unders tand is how this is only affecting the MBA and MBP 2020 models.


What did they change? If it is only affecting a this years models then surely that would rule out a OS fault.

Surely if it rules out an OS fault then it must be a hardware fault and if it is a hardware fault then there must be thousands of people with this issue out there.


I keep looking for a patch or fix to come out but I'm not confident it will be soon.

Jul 14, 2020 11:11 AM in response to hyprstack

I have been in contact with apple support for two months and have spent many hours on this problem. I spoke to several support engineers and uploaded gigabytes of logs. I have excluded and replaced all peripherals. It was persistently maintained that it could not be the MacBook.


But today I got a call from Apple. They still believe that there may be something wrong with the Macbook or MacOs. They started an internal investigation after several complaints. They hope an update can fix this problem. Apple support will contact me as soon as more is known or when a software update is available.


I understand that this is not an immediate solution, but that they finally admit that there may be an issue sounds somewhat satisfying for now

Jul 14, 2020 11:17 AM in response to klaas226

Thank you for the update.


I had to get. CalDigit hub. I paid for the ‘fix’ because I needed to use the MacBook for work.


After a bit more testing, it seems that ANY USB 2.0 device can cause the USB ports to lock up.


Since using the CalDigit hub I’ve not had a single issue. This hub terminates USB 2.0 connections and then presents them to the Mac as USB 3.0 connections.


This is where I think the issues are. I’ve seen other people mention this.

Usb port stops working after a while on new 2020 mac book pro13, mac OS catalina 10.15.4

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