BridgeOS Crashes Happening on 2018 MacBook Pro with TouchBar

I also run clamshell mode, FWIW.

I woke up at 0400 to check on my backups this morning and it had indeed restarted again preventing the backups from completing.

After noting the restart at 0400, I used settings to prevent the MBP from sleeping at all and restarted an Acronis True Image backup to USB disk. No restart happened in the 2 1/2 hours, but the backup still failed near the end on drive not accessible. This highlights a second problem where my USB drives seem to want to disappear now, even when actively in use.

In my case, I replaced my older MBP 2016 and put down the new MBP 2018 in the same place with the same peripherals and connections. But in the same setup, I have the spontaneous restarts and can't reliably get full backups using either Acronis or TimeMachine without the disks going offline. I really should not have sold the MBP 2016 so quickly because my work feels at risk now. Lack of reliable backups and concerns about file system health from all the bouncing is keeping me awake at night.

I will continue to try different settings to find something helps and report if I stumble across something. Next up, I am going to try having the MBP never sleep and drives never sleep.

James Solderitsch wrote:

Diagnostics Information (past 7 days):

2018-07-26 09:15:43 Last Shutdown Cause: -20 - Unknown

Thanks for the EtreCheck report. I think we can definitively say that a -20 is no longer "Unknown". No fix for it yet though.

I’m trying the same now. My crashes all happened in the middle of the night during sleep, and the latest one was 4 days removed from the previous, so I don’t think I’ll know whether this worked immediately.

The crypto var errors are gone after wiping the disk at least, though I’m not sure if this is relevant.

Hey folks,

i have this problem since March/April this year ! (had the 15'' 2017 maxed out modell)

Now I am running the new 13" i7 Modell from 2018 and it happens over and over again.

Today I wiped everything once again, no migration, no backup - and it happend just seconds ago, while running - suddenly my external peripherals werent accepted anymore , so my external soundcard shut down -> no sound

I restarted the mac : right before it went completly off the FAN speed went to the MAX , after several seconds Log In window and again the kernal panic / memory stackshot bla bla :macos_system_state":"running","bug_type":"210"

I ll think im gonna return this little beast and wait for the iMac to come alive ... its sooo annoying

mlsfw wrote:

This sounds alarming. It’s not just a T2 chip issue as some reported on iMac Pro. Maybe all Tx chip issue or general OSX problem? I am still using 2014, 2015 MBP 15 which have never this issue, though...

The iMac Pro has the same T2 chip. The older machines with the T1 chip don't seem to have this problem.

If the panic crash is related to T2 chip, do you actively use touch bar? I’m wondering if someone who don’t get panic use less frequently the touch bar.

T2 does a lot more than touch bar. But my panic happened around the time when I modified the touch bar setting and used a lot. I also found a bug that sometimes icons are not aligned as I configured. Maybe this could be a triggering action of the panic crash?

Having this issue, as well. Picked up my 2018 15-inch i9 on Tuesday, set up via Time Machine backup. CPU experienced kernel panic overnight while plugged in to an OWC Thunderbolt 3 dock, as I came back to find it had shut down. Brought the machine into work the past two days, where I've left it at the lock screen while connected to power, only to come back and find the same thing has happened two more times. Thought I was in the clear after turning off Power Nap after the second panic, but just experienced again about an hour ago.

Keeping an eye on this thread for the (hopefully) eventual fix.

The latest replies to this thread aren't showing up for some reason.

Anyway, to the last few posters: was there anything connected (even if it wasn't powered on) when you experienced the Bridge OS crashes? Particularly a Thunderbolt 3-> Thunderbolt two adapter.

My first machine was crashing on wake from sleep almost every time with nothing connected.

I received my replacement on Monday. It initially crashed 3 or 4 times but then just stopped crashing.

It has been running 3 days with no crashes now. I re-enabled powernap and hey siri yesterday and still no crashes.

I also should mention I registered a card for apple pay on Monday as well. No idea whether that contributed to anything, but there were no crashes since the registration.

They asked the exact same thing of me. I already sent them logs of the first crashes (with stuff attached). Now they want me to see if it crashes with only the power adapter attached (which it did last night).

Did your Apple rep give you any indication that a replacement machine will fix the issue? Mine didn't seem optimistic that it would. I'm worried I'm setting myself up for another round of reinstalling and wasting my time.

There's little doubt this will be fixed. How soon is the question. Based on what they wanted from me and what you see posted in forums, they are going about it the right way. They no doubt realize the pressure has just dialed up and resources are being applied. iMac Pro is probably a bit of a niche product but MacBook Pros aren't. So as the MBPs roll out, the visibility of the problem may start to ramp up. Like they say, "you always find it in the last place you look." An engineer may find a bad pointer tomorrow and suddenly we all have a fix. Or not. It seems clear there is no one-to-one correlation to a single factor like wake on watch, power nap or the other half dozen settings metioned. I've tried them all. Similarly none of the external device connections I've tried make it go away. The one correlation I can think of is that bare machines are better for everyone, but still don't prevent the occasional restart. This experience has taught me how much I am used to doing at night in terms of housekeeping tasks after I walk away. Things like backups and large file transfers that I routinely start, sleep the display and go to sleep knowing it will be doing something for a couple of hours and then sleep. If not for that, and the fact it does it to me at lunch once in a while, I would just shutdown at night and wait however long it takes. I am thankful that as long as the machine is awake and I am actually using it, I am good to go without a single restart, so far. I'll keep uploading crash reports and diagnostics, but I imagine they are pretty much the same and don't tell them much beyond a certain point. I'm still digging how noticeable the difference is of 6 cores and 32 GB in my work so that is some consolation for the time being.

I just experienced Bridge OS crash for the first time last night. I did browse through this thread for any useful information and so far my crash appears to be the same as mlsfw.

It happened while the MacBook Pro was asleep. I was watching TV at the time so I wasn't paying attention. I only noticed after the fan started to spin very loudly. I looked at the display and saw user login screen with a message that I must enter password after a restart. That was when I realized that something had gone wrong (Bridge OS crashed).

Peripherals connected at the time of crash:

- Two external USB hard disks via USB-C to USB adapters (at left Thunderbolt 3 ports)

- Belkin Gigabit Ethernet Adapter (at right Thunderbolt 3 port)

- 87W USB-C Power Adapter (at right Thunderbolt 3 port)

I've had this MacBook Pro for 22 days without Bridge OS crash so I thought I was lucky, but I guess not. 😟

I contacted Apple Support and they will call me at 11 am today. They also gave me a case number (100608375220).

Andrew,

the first time, I had a couple of external devices attached (Samsung SSD, mouse, keyboard, all via a Apple USB-C AV Adapter), running VirtualBox with a couple of VMs and was testing some NetInstall processes (so lots of disk IO).

The second time, I was editing a document with Pages.

-- you saw machine suddenly turn into black screen during normally using it in macOS?

The third time, I was in bed asleep and it just did the "sleep crashing" thing that everyone has been talking about.

-- after you woke up, you just opened the lid, found machine reboot and panic message in Finder?