Does anyone know how I can obtain the bridgeOS IPSW for 17P50521d? Something happened to my macbook pro running catalina and now it's booting into DFU requiring a restore from a secondary mac using usb-c or thunderbolt. I've run into an issue where I can't update it because it appears configurator 2 cannot find a matching version, and can only obtain the currently released version. This has essentially bricked my macbook making it unable to boot at all.
Any guidance would be appreciated.
Same issue here. MBP15 2018. These steps were taken:
0. Catalina installed.
1. Entering DFU mode was OK.
2. Then Configurator 2.10 ultimately failed. It tried to downgrade firmware from new (17P50521d) to old stable one:
US Desc: backwards update not allowed: 17P50521d -> 16PXXX
Domain : AMRestoreErrorDomain
Code : 0x4F (79)
3. Then iBridge showed up in Recovery mode. But configurator still trying to load old firmware to iBridge. That's it. No way to choose, no link to new Restore ipsw firmware.
I've tried many ways to find the restore image can't find it anywhere. Hoping someone from apple could provide it. Otherwise basically have to wait till restore servers have a versus equal to or higher then currently installed version.
Bump. Anyone from apple technical team able to help?
Me too. Tried everything. I even created the Catalina install disk with all the additions downloaded (another key in createimagemedia CLI. But it only downloaded 2 files that are destined to update iBridge to 3.6. And it is not a full Recovery image but a Delta upgrade (extracted the file and compared to 3.6 recovery) Monday I left my laptop in Apple Service. Today I’ve got it back with replaced MB and TouchBar board. Discussed it with a tech guy there. He said that the new Recovery for iBridge 4.0 is not available. So they replaced the hardware.
My 2018 macbook pro doesn't have applecare, was yours?
No. I have no AppleCare for this laptop. It is Public Beta test (3.6 released, but feeling like beta - very unstable for me, 4.0 really is beta) so Apple should replace your MB too.
In Apple Authorized Service Center I insisted that my laptop had problems even before the July Security Update [ iBridge 3.6 ] (sleep mode to sudden power off, charging issues with different chargers/cables, apps freezing, not powering up). So I tried to fix it with Beta software.
Today Apple released new iBridge FW version 16P6571 to fix sleep mode issues (it remained even on brand new motherboard with previous version). Hopefuly, it will fix it.
I'm not planning updating to Catalina soon after release. I will wait for patches to iBridge and then update (6 monthes wait time minimum). These new T2 chips causing A LOT of issues with no visible benefits so far.
+1, I'm also affected by the same problem....
With Catalina being released together with BridgeOS 4.1 I guess more people are going to run into the update bricking their device.
It is now possible to restore BridgeOS 4.x using DFU / Apple Configurator 2.
There is just one catch: the host mac (i.e. the one running AC2) must have a system update called "MobileDeviceOnDemand.pkg" installed (which somehow facilitates interaction with newer Apple devices I guess).
You can find a direct download link from Apple's servers by searching the text file
https://swscan.apple.com/content/catalogs/others/index-10.14-1.sucatalog
(replace "10.14" with host macOS version).
Also installation can be triggered by connecting a device with iOS 12+ (I have not tried this though).
Hope this helps someone to restore their mac.
