Cannot install macOS Big Sur Beta

I am having the same issues.

Same here

Same issue.
clean install not workong. Upgrade not working.
several errors in the install log.

Same Problem at 12 min (10 min after showing text about error).

Having the same issues; I even struggle to get the installer to download. Guess it was a sign that something is off. Better to stay away from this beta; wonder why it was delayed.

I am having the same issue. No progress after 12 minutes and then it fails with an error on MBP 16

Same problem.

Same here

• did SMS reset - no luck

• now deleted installer - re downloading - need to check if it can

• installer shows version 11.

Still awaiting answers.. Macbook Pro 16" 2019

Ok, did few more tries and when checking error - its all about BridgeOS udpate issue. Not sure why this is an error,

Aug 13 22:14:14 RB-MBP16 osinstallersetupd[964]: Retrieved package com.apple.pkg.BridgeOSBrain (http://swcdn.apple.com/content/downloads/62/13/001-35032-A_8R6TI52SJO/czn472a52g0bioec0sjrkh6mbrnnqhwuro/BridgeOSBrain.pkg)
Aug 13 22:14:14 RB-MBP16 osinstallersetupd[964]: Starting bridgeOS update prepare
Aug 13 22:14:49 RB-MBP16 osinstallersetupd[964]: bridgeOS prepare summary: 17P6610 -> 18P50347c, update = 18.16.10347.5.3, brain = 18.16.10347.5.3, variant = com.apple.bridgeOSCustomer, macOS = 19G2021 (customer), project = BridgeOSInstall-77, userAuth = 0, prod fused = 1, model = j152fap, client = InstallAssistant, retries = 2, session = 742B6F88-546A-46E0-B693-DB9A51574094: Error Domain=BOSErrorDomain Code=204 "An error occurred during preflight." UserInfo={NSLocalizedDescription=An error occurred during preflight., UpdateBundleIdentifier=com.apple.bridgeOSCustomer, NSUnderlyingError=0x7fbdb3d8d750 {Error Domain=BridgeOSSoftwareUpdateError Code=19 "MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);" UserInfo={SystemPartitionSize=1979666432, MSUErrorCode=37, MSUErrorDescription=FCRT migration failed., NSLocalizedDescription=MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);}}}
Aug 13 22:14:49 RB-MBP16 osinstallersetupd[964]: bridgeOS update prepare complete
Aug 13 22:14:49 RB-MBP16 osinstallersetupd[964]: bridgeOS update prepare failed: Error Domain=BOSErrorDomain Code=204 "An error occurred during preflight." UserInfo={NSLocalizedDescription=An error occurred during preflight., UpdateBundleIdentifier=com.apple.bridgeOSCustomer, NSUnderlyingError=0x7fbdb3d8d750 {Error Domain=BridgeOSSoftwareUpdateError Code=19 "MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);" UserInfo={SystemPartitionSize=1979666432, MSUErrorCode=37, MSUErrorDescription=FCRT migration failed., NSLocalizedDescription=MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);}}}
Aug 13 22:14:49 RB-MBP16 osinstallersetupd[964]: Operation queue failed with error: Error Domain=com.apple.OSInstallerSetup.error Code=602 "An error occurred installing macOS." UserInfo={NSLocalizedRecoverySuggestion=You can try again to complete the installation., NSLocalizedDescription=An error occurred installing macOS., NSUnderlyingError=0x7fbdb3de4450 {Error Domain=BOSErrorDomain Code=204 "An error occurred during preflight." UserInfo={NSLocalizedDescription=An error occurred during preflight., UpdateBundleIdentifier=com.apple.bridgeOSCustomer, NSUnderlyingError=0x7fbdb3d8d750 {Error Domain=BridgeOSSoftwareUpdateError Code=19 "MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);" UserInfo={SystemPartitionSize=1979666432, MSUErrorCode=37, MSUErrorDescription=FCRT migration failed., NSLocalizedDescription=MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);}}}}}
Aug 13 22:14:49 RB-MBP16 InstallAssistant[962]: Stopped operation queue with Error Domain=com.apple.OSInstallerSetup.error Code=602 "An error occurred installing macOS." UserInfo={NSUnderlyingError=0x7fb4b1485680 {Error Domain=BOSErrorDomain Code=204 "An error occurred during preflight." UserInfo={NSUnderlyingError=0x7fb4b14dce00 {Error Domain=BridgeOSSoftwareUpdateError Code=19 "MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);" UserInfo={SystemPartitionSize=1979666432, MSUErrorCode=37, MSUErrorDescription=FCRT migration failed., NSLocalizedDescription=MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);}}, NSLocalizedDescription=An error occurred during preflight., UpdateBundleIdentifier=com.apple.bridgeOSCustomer}}, NSLocalizedRecoverySuggestion=You can try again to complete the installation., NSLocalizedDescription=An error occurred installing macOS.}

I am having the same issue (it always happens around 10-12 mins remaining):

An error occurred installing macOS.
You can try again to complete the installation.


I have reset the PRAM/NVRAM.
I have reset the SMC.
I have re-enlisted in the beta program.
I have re-installed the beta software.
and I have re-downloaded Big Sur install software

All with not avail...

MacBook Pro (15-inch, 2018) 2.9 GHz 6-Core Intel Core i9
32 GB 2400 MHz DDR4 Intel UHD Graphics 630 1536 MB

I'm getting exactly the same error. Has something to do with bridgeOS. I've tried creating a new partition. Re-installing Catalina. Finally I just wiped the entire hard drive and did a clean install of Catalina. Same exact thing.

Would love to know if someone comes up with a fix. Reboot certainly didn't do anything. I've also tried installing from a boot disk, installing in recovery mode, safe mode, internet recovery mode.

Log:

Code Block 
Aug 13 19:48:02 Dereks-MacBook-Pro osinstallersetupd[2887]: Retrieved package com.apple.dmg.BaseSystem (linkfile-validated:///System/Volumes/Data/macOS%20Install%20Data/UpdateBundle/AssetData/Restore/BaseSystem.chunklist:::/System/Volumes/Data/macOS%20Install%20Data/UpdateBundle/AssetData/Restore/BaseSystem.dmg)
Aug 13 19:48:02 Dereks-MacBook-Pro osinstallersetupd[2887]: Started downloading package com.apple.pkg.BridgeOSUpdateCustomer (http://swcdn.apple.com/content/downloads/62/13/001-35032-A_8R6TI52SJO/czn472a52g0bioec0sjrkh6mbrnnqhwuro/BridgeOSUpdateCustomer.pkg)
Aug 13 19:48:05 Dereks-MacBook-Pro osinstallersetupd[2887]: Machine thermal state is now normal
Aug 13 19:48:51 Dereks-MacBook-Pro osinstallersetupd[2887]: Retrieved package com.apple.pkg.BridgeOSUpdateCustomer (http://swcdn.apple.com/content/downloads/62/13/001-35032-A_8R6TI52SJO/czn472a52g0bioec0sjrkh6mbrnnqhwuro/BridgeOSUpdateCustomer.pkg)
Aug 13 19:48:51 Dereks-MacBook-Pro osinstallersetupd[2887]: Started downloading package com.apple.pkg.BridgeOSBrain (http://swcdn.apple.com/content/downloads/62/13/001-35032-A_8R6TI52SJO/czn472a52g0bioec0sjrkh6mbrnnqhwuro/BridgeOSBrain.pkg)
Aug 13 19:48:51 Dereks-MacBook-Pro osinstallersetupd[2887]: Retrieved package com.apple.pkg.BridgeOSBrain (http://swcdn.apple.com/content/downloads/62/13/001-35032-A_8R6TI52SJO/czn472a52g0bioec0sjrkh6mbrnnqhwuro/BridgeOSBrain.pkg)
Aug 13 19:48:51 Dereks-MacBook-Pro osinstallersetupd[2887]: Starting bridgeOS update prepare
Aug 13 19:49:31 Dereks-MacBook-Pro osinstallersetupd[2887]: bridgeOS prepare summary: 17P6610 -> 18P50347c, update = 18.16.10347.5.3, brain = 18.16.10347.5.3, variant = com.apple.bridgeOSCustomer, macOS = 19G2021 (customer), project = BridgeOSInstall-77, userAuth = 0, prod fused = 1, model = j213ap, client = InstallAssistant, retries = 2, session = CE2E5616-57E4-4553-AFF8-546EF350DB59: Error Domain=BOSErrorDomain Code=204 "An error occurred during preflight." UserInfo={NSLocalizedDescription=An error occurred during preflight., UpdateBundleIdentifier=com.apple.bridgeOSCustomer, NSUnderlyingError=0x7ff12a5b1660 {Error Domain=BridgeOSSoftwareUpdateError Code=19 "MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);" UserInfo={SystemPartitionSize=1822380032, MSUErrorCode=37, MSUErrorDescription=FCRT migration failed., NSLocalizedDescription=MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);}}}
Aug 13 19:49:31 Dereks-MacBook-Pro osinstallersetupd[2887]: bridgeOS update prepare complete
Aug 13 19:49:31 Dereks-MacBook-Pro osinstallersetupd[2887]: bridgeOS update prepare failed: Error Domain=BOSErrorDomain Code=204 "An error occurred during preflight." UserInfo={NSLocalizedDescription=An error occurred during preflight., UpdateBundleIdentifier=com.apple.bridgeOSCustomer, NSUnderlyingError=0x7ff12a5b1660 {Error Domain=BridgeOSSoftwareUpdateError Code=19 "MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);" UserInfo={SystemPartitionSize=1822380032, MSUErrorCode=37, MSUErrorDescription=FCRT migration failed., NSLocalizedDescription=MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);}}}
Aug 13 19:49:31 Dereks-MacBook-Pro osinstallersetupd[2887]: Operation queue failed with error: Error Domain=com.apple.OSInstallerSetup.error Code=602 "An error occurred installing macOS." UserInfo={NSLocalizedRecoverySuggestion=You can try again to complete the installation., NSLocalizedDescription=An error occurred installing macOS., NSUnderlyingError=0x7ff12a508b70 {Error Domain=BOSErrorDomain Code=204 "An error occurred during preflight." UserInfo={NSLocalizedDescription=An error occurred during preflight., UpdateBundleIdentifier=com.apple.bridgeOSCustomer, NSUnderlyingError=0x7ff12a5b1660 {Error Domain=BridgeOSSoftwareUpdateError Code=19 "MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);" UserInfo={SystemPartitionSize=1822380032, MSUErrorCode=37, MSUErrorDescription=FCRT migration failed., NSLocalizedDescription=MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);}}}}}
Aug 13 19:49:31 Dereks-MacBook-Pro InstallAssistant[2886]: Stopped operation queue with Error Domain=com.apple.OSInstallerSetup.error Code=602 "An error occurred installing macOS." UserInfo={NSUnderlyingError=0x7f94ba35e5b0 {Error Domain=BOSErrorDomain Code=204 "An error occurred during preflight." UserInfo={NSUnderlyingError=0x7f94ba35e760 {Error Domain=BridgeOSSoftwareUpdateError Code=19 "MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);" UserInfo={SystemPartitionSize=1822380032, MSUErrorCode=37, MSUErrorDescription=FCRT migration failed., NSLocalizedDescription=MSU - 37 (FCRT migration failed.);NSPOSIXErrorDomain - 2 (failed to statfs /private/var/hardware);}}, NSLocalizedDescription=An error occurred during preflight., UpdateBundleIdentifier=com.apple.bridgeOSCustomer}}, NSLocalizedRecoverySuggestion=You can try again to complete the installation., NSLocalizedDescription=An error occurred installing macOS.}

Same

Immediate fix for me:

I had inadvertently enabled "FileVault" when setting up new 13" MBP. Disabled it and had no problem installing Big Sur after that.

Hope that helps.

Thanks!

I always keep FileVault turned on. Perhaps that triggers the error. Will try tonight and will report back!

Disabling FileVault did not help. I guess I'll wait for couple of more betas before trying again.

seeing exactly the same
have tried the dev and public betas

Same here with the public beta

• I tried to install on external SSD

• Encountered this issue

• Force Rebooted my Mac

• Saw An error occurred installing macOS. You can try again to complete the installation"

The issue persists with dev beta 5.
As suggested by dcas and rb69 this has something to do with BridgeOS update. Did anyone succeeded finding a workaround?

Same issue

Public bete 5: Same problem

Same issue here. Tried all the ideas anyone has suggested when the issues of installing Big Sur. No help.
MacBook Pro (13-inch, 2020)

Same problem here.

Was on Public Beta 1 on Macbook 2015 running smoothly, attempted to update to Beta 5 (public beta 2), crashed while installing, the beta is now still present in system preferences however download won't complete, nor will install ever occur.

Have tried via terminal command line - no different.

There’s a bit of download to be down while the installation is in progress. Check below:

Aug 24 13:27:27 Shiham-MBPR osinstallersetupd[2234]: Retrieving 4 packages (1.193 GB)
Aug 24 13:27:27 Shiham-MBPR osinstallersetupd[2234]: Started downloading package com.apple.pkg.BridgeOSUpdateCustomer (http://swcdn.apple.com/content/downloads/33/25/001-36812-A_S039U0DYM5/3g8uq0l1rzpxhuk8z4woz38c8k4vv0iuoi/BridgeOSUpdateCustomer.pkg)
Aug 24 13:44:19 Shiham-MBPR osinstallersetupd[2234]: Retrieved package com.apple.pkg.BridgeOSUpdateCustomer (http://swcdn.apple.com/content/downloads/33/25/001-36812-A_S039U0DYM5/3g8uq0l1rzpxhuk8z4woz38c8k4vv0iuoi/BridgeOSUpdateCustomer.pkg)

A similar problem on my MacBook Pro 15 2018 release, and on MacBook 12 everything went without problems, apparently the problem is related to T 1/2 security chips.

I managed to fix this and the 'Cannot install error'

Using a combination of the following (I don't know which worked)

1. Reset PRAM

2. Disable Filevault

3. Boot into Recovery and enable Startup Security

4. Use sudo sh -c "softwareupdate -ia" via terminal

Macbook 2015, Previously unable to restart with kernal panics and unable to install/download Public Beta 5