MBP 13 2020 won't recognize USB devices from TB dock after sleeping and connecting to the dock. After unplugging the dock MBP crashes and does SMC reset

First of all, that is a completely different issue.

Second: it's been discussed over 23 pages long here that you either upgrade to Big Sur or suffer forever since it doesn't seem feasible for Apple to invest time in fixing this issue on a previous OS - apparently.

Third: why can't I unsubscribe from this thread already? :D I mean I've clicked at least twice on the "following" button and watch it change status, only to receive yet another email from here and see the status revert.

Should start to tweet to @Apple with #fixmymacbook.

See if it makes them move....

Multiple people has confirmed BS fixed it.

Apple support is recommending sending my machine in for 'repair' to resolve this issue after escalating to engineering and gathering logs.

Exactly the same issue with MB Pro 2020 4TB, Catalina 10.15.6 and the same dock. After SMC reset and safe boot, the issue disappeared for two days, but did now return when attaching the Macbook. Tomorrow there will be 2nd support call, let's see what their solutions will be.

I picked up on this thread as experiencing similar USB-C issues

MacBook Air 2020 10th gen 1.1 ghz i5 - Catalina 10.15.6

When connecting USB-C hub or USB-C to 3.0 adaptor even without any peripheral connected (several reputable makes tried) it can:

Crash and reboot with an error that it recovered from a problem, error report Intel CrashLog recorded due to unexpected reset. (this had not occurred prior to 10.15.6)

USB Ports become inoperable for devices - but charging still works

If Air restarted, on restart generates message “your machine shutdown because of a problem” and USB ports return to operation for devices.

Weary of trying to find a workaround

I never had powernap enabled and still it crashes with my TB3 dock. 100% reproducible.

1) it works after fresh boot

2) I disconnect the dock and put Macbook into sleep

3) wake it up again and connect the dock again - this time USB ports and ethernet in the dock does not work

4) disconnect the dock and gets kernel panic and SMC reset after few seconds

Chiming in to add that this is also happening to me with a 2020 MacBook Air i5 on Catalina 10.15.6 with either a CalDigit TS3 thunderbolt dock OR with plugging a USB-C monitor (in my case, an HP Z27) in directly.

It sounds nearly exactly the same as the original poster and many of the responses. After the MacBook has been asleep for a bit (at least a few minutes, but definitely if it's been a few hours), when I plug in the thunderbolt dock or monitor, the monitors work and the charging works and all the USB peripherals have power, but the laptop doesn't seem to recognize any USB peripheral (does not respond to USB keyboard or plugged-in trackpad; hard drives don't mount). Unplugging and plugging back in USB bits makes no difference.

If I then unplug the monitor or hub, within a few seconds the laptop crashes. Blank screen, apple logo, "Your computer restarted because of a problem". Sometimes the fans spin up to full speed for a moment just before it crashes. The error reporter when it starts back up says "Intel CrashLog recorded due to unexpected reset" with no other details.

The timing of all this starting to happen for me appears to line up with the mid-July release of 10.15.6.

I'm grateful others are commenting here. I've been going nuts trying to troubleshoot this and if nothing else it's nice to know I'm not alone.

Just found this thread - exact same issue started on my 2020 MacBook Pro since the 10.15.6 update. Driving me crazy - USB devices stop working followed by a hard crash, happening at least once a day.

Hmmm, thank you for trying and for your feedback. I used it a couple of days ago to file the bug and it worked fine for me. I not part of any beta programs either, but have a (free of charge) developer login. Either way, if people put a short description into the crash report which you are being asked to send that the issue is related to TB3 docks reproducibly crashing with 10.15.6 with a link to this thread, that should also help.

Same problem: MBA 2020 does not recognize the - tailor made for Mac ecosystem... - LG Ultrafine 4k 23' display connected over thunderbolt 3 and crashes after unplugging of the same (on a daily basis). The problem appears since updating to 10.15.6 (bought at the end of March with what I think was 10.15.3 preinstalled) and after a "longer" time of running without shut down.

I really wonder how Apple can ignore such an annoying (the workflow disrupting) bug, when one would assume that their software and hardware engineers would work with their own distributed and promoted hardware on a daily basis?!

copied from console:

{"caused_by":"macos","macos_version":"Mac OS X 10.15.6 (19G2021)","os_version":"Bridge OS 4.6 (17P6610)","macos_system_state":"running","incident_id":"CADA0967-22CB-449C-B1B5-57A542D4D209","timestamp":"2020-08-23 16:19:36.00 +0000","bug_type":"210"}

{

"build" : "Bridge OS 4.6 (17P6610)",

"product" : "iBridge2,15",

"kernel" : "Darwin Kernel Version 19.6.0: Thu Jun 18 20:30:46 PDT 2020; root:xnu-6153.145.1~1\/RELEASE_ARM64_T8010",

"incident" : "CADA0967-22CB-449C-B1B5-57A542D4D209",

"crashReporterKey" : "c0dec0dec0dec0dec0dec0dec0dec0dec0de0001",

"date" : "2020-08-23 16:19:36.28 +0000",

"panicString" : "panic(cpu 0 caller 0xfffffff01750d4fc): x86 CPU CATERR detected\nDebugger message: panic\nMemory

Device: MBP 13" 2020 10th gen i5

OS: Catalina 10.15.6

Peripherals: Apple Thunderbolt Display + Apple brand USB-C adapter

I've had what I think is a similar issue: when I unplug my MacBook Pro (2020) from an Apple Thunderbolt Display (using only Apple brand cords and adapters), the computer crashes and tells me an Intel CrashLog was reported. I bought the Pro after having the same problems with a 2020 MacBook Air, but it seems to be a problem across the lineup.

eddispgeddi: I doubt there is any service responsible for this. This goes down to kernel drivers, so if something may be possible it may be replacing appropriate kexts (kernel extensions) with older ones - but even that may not work of course as older kexts may not be directly compatible (depends whether kernel has changed between last minor versions).

Also Apple is known for not responding to issues ever. So yeah, welcome to Apple world I guess.

Also have this issue with MBP2020 13 i7 with CalDigit TS3 Plus.

If you're running the CalDigit Docking Station Utility, you can see the dock.

But on unplug and replug, although my external monitors work, peripherals plugged into the dock e.g. webcam are not visible to the Mac.

Then eventually you get a crash - "Intel CrashLog recorded due to unexpected reset".

MacOS is version 10.15.6, Caldigit software/firmware all latest.

Very frustrating as my old Mac would sleep/run/sleep/run for months. But every time I disconnect the dock I know I'm going to get a crash.

By the looks of the comments here it's not limited to CalDigit kit - seems to be OS/firmware related on the MBP.

Having the same problem with a 2020 MacBook Air (i5, 16GB RAM) and a Kensington (K38625US) thunderbolt dock. I'm plugging into an LG 27GL83A-B as well as a Dell U2419HC. I've tried many fixes that have been listed by others here. It seems to be OS related. Happens on a daily basis.

I seem to be able to recreate it by connecting my laptop to the thunderbolt dock, docking my laptop by closing the lid and using it, undocking my MacBook by unplugging it (when I switch to docking my work laptop instead), and then plugging my MacBook back in to dock it. It always fails to dock properly, and when I unplug it and open the lid, it crashes and tells me "Intel CrashLog recorded due to unexpected reset" on reboot.