Error installing macOS Big Sur: "The package %@ is missing or invalid"

App & System Services Core OS macOS

davidliu2005 OP

Created Jun ’20

Replies 23

Boosts 0

Views 20k

Participants 22

I tried to install macOS Big Sur on my MacBook Pro 2019, now running Catalina 10.15.6b1.

However, in every trial after downloading the 9.56GB package, the error info "The package %@ is missing or invalid" always pop-up.

Anyone has a solution to this?

Boost

alex_v OP

Jan ’21

ok, so I tried a few things:

Safe mode tip: didn't help
installed latest Catalina updates: didn't help
finally I tried the "create new >10Gb disk partition" tip from Nathaniel Gibson above and also installed the latest security updates and this seemed to do the trick and then it worked. I suspect that the creating new partition somehow forces the OS to clean up disk storage issues while it is resizing the partitions and this fixes whatever the problem was.

FRed3137 OP

Mar ’21

You need to install latest Catalina update.
That's what I did and it worked.

liangtf OP

Mar ’21

In case somebody doesn't know how to update the latest security update, like me:
There is a button "Advance..." below the Big Sur update box, click the button and the latest Sarafi security update will show up.

ian-mungai OP

Apr ’21

This worked for me
Disable file vault
Restart your mabook
Update using the app store

cdater OP

Apr ’21

I believe this is a security issue. I utilize a DNS honeypot and VPN to limit advertising cookies and unseen hooks by Amazon, Google, etc into my home in order to privatize my personal data and browsing history and this causes issues with updating my Apple, and other services. When I disable it, everything updates just fine. I then enable my security and feel secure once again

vasylnahuliak OP

Jun ’21

Device: MacBook 2019 16''

Solution:

Upgrade to latest Catalina from Apple Icon > About This Mac > Software Update
Download Big Sur Update from App Store
Install Big Sur from Launchpad

mr_datsun OP

Aug ’21

Lastest catalina update (10.15.7) fixed it for me.

Lucasea OP

Dec ’21

Make sure your current named OS is fully up to date before upgrading a new named version. I had a couple updates pending on Catalina when I got the “%@ package missing” error trying to install either Big Sur or Monterey. Updated Catalina, then did Monterey upgrade with no problems; didn’t even have to do the Big Sur upgrade separately like I thought I might.