MacOS Public Beta Big Sur Unable to install

Question

Created Aug ’20

Replies 7

Boosts 0

Views 2.5k

Participants 7

Hey Everyone, I'm having an issue installing the public beta of Big Sur, I'm able to install the profile and download the whole 12.something GB, however when I go to install the Mac OS I choose the Hard Drive then it starts installing and it gets stuck at 12minutes every time.

Then it prompts and error "an error occurred installing MacOS"
then underneath says "you can try again to complete the installation"

I have tried this multiple times and even formatted my macOS via Disk recovery and tried reinstalling Catalina however still same error.

I'm using a late 2018 MacBook Pro, fully spec so I know its not a compatibility issue.

I was kinda ready to give up but I kinda just wanna get to the bottom of this now. id appreciate anyones ideas thanks

Boost

Answer 1

Imstevejobs OP

Aug ’20

Same. I’ve literally tried everything. Spent over an hour on the phone with Apple and couldn’t get it to work. Wiped my computer, downgraded to Mojave and nothing works

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Answer 2

cre325 OP

Aug ’20

I am having exact same issue with MacBook Air 2018. Can’t find a solution anywhere

1

Answer 3

sashag OP

Aug ’20

Same. Fresh out of box 2020 MB pro 13 — did initial Catalina update, too. Beta worked fine on previous MB pro 15 (mid 2017)

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Answer 4

zeroklone OP

Aug ’20

Exact same problem over here on a 2018 MacBook Air. I've tried formatting my drive and upgrading from a clean version of Catalina as well as making a bootable Bug Sur flash drive and installing from that. Same issue.

I thought about giving up, but what if this happens with the final release as well?

0

Answer 5

Imstevejobs OP

Aug ’20

Same. Tried again an hour ago. Still failing. Wish someone knew what the fix was. How the heck am I supposed to beta test if I can’t even install the damn OS

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Answer 6

the.bean OP

Aug ’20

When attempting to install the Big Sur Public Beta my hard drive is grayed-out and I'm advised I don't have enough memory (which isn't actually the case). Apple support had me running around loops for over an hour until the situation was escalated to a specialist who then grimly explained there is no support for Big Sur yet. Come on Apple, you can do better. Like maybe weigh-in here and help us. Or, maybe the rascals are ignoring us because we dare to post this on the App Development site.

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Answer 7

sanat_angrish OP

Aug ’20

ok guys...so the solution to this problem is to revive the bridge os from a secondary MacBook using apple configurator 2 available on the App Store.

I have faced this issue for months with both developer and public beta's and the only working fix I found is this.
pretty sure it will work and then thank me when ur on big Sur :-)
search for "reviving firmware/bridgeos" and u'll find a step by step guide.
https://support.apple.com/en-gb/guide/apple-configurator-2/apdebea5be51/mac

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