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Warbrain

macrumors 603
Original poster
Jun 28, 2004
5,702
293
Chicago, IL
Hey all,

I'm trying to install Big Sur as an upgrade over Catalina on a 2019 16-inch MacBook Pro. No matter what I do I cannot get past "Less than a minute remaining" on the progress bar. I've left it for six+ hours, nothing changes. Reboot, shows me the Catalina login screen, and goes back to the same progress bar. I can and always have restored back to Catalina without any problems when I can't get past this.

What am I doing wrong to get this installed? Anyone have any tips/ideas as to why this is happening?

Thanks.
 

Mr Todhunter

macrumors 6502
Apr 4, 2010
471
338
Third planet from the Sun
Hey all,

I'm trying to install Big Sur as an upgrade over Catalina on a 2019 16-inch MacBook Pro. No matter what I do I cannot get past "Less than a minute remaining" on the progress bar. I've left it for six+ hours, nothing changes. Reboot, shows me the Catalina login screen, and goes back to the same progress bar. I can and always have restored back to Catalina without any problems when I can't get past this.

What am I doing wrong to get this installed? Anyone have any tips/ideas as to why this is happening?

Thanks.
I had the same problem until I read somewhere that the installer needs more than 62 gb space (on the disk you are installing to). I was trying to install on a 64 SD card (obviously even 64gb was not enough). So I tried again on a 500 gb WD ssd disk and it when very smoothly. It stayed on ” Less than a minute remaining” for approximately 20 minutes and then it booted.
 

Warbrain

macrumors 603
Original poster
Jun 28, 2004
5,702
293
Chicago, IL
I had the same problem until I read somewhere that the installer needs more than 62 gb space (on the disk you are installing to). I was trying to install on a 64 SD card (obviously even 64gb was not enough). So I tried again on a 500 gb WD ssd disk and it when very smoothly. It stayed on ” Less than a minute remaining” for approximately 20 minutes and then it booted.

I have over 500GB free on my SSD so it definitely can't be that.
 

itsmilo

Suspended
Sep 15, 2016
3,985
8,728
Berlin, Germany
Mine was also stuck at „one minute remaining“ at around 1/3 of the progress bar but I left my MacBook on over night and now 7 hours later it was actually installed!
 
Last edited:

itsmilo

Suspended
Sep 15, 2016
3,985
8,728
Berlin, Germany
And this was in a VM, right?

yeah, first i tried virtual box and then i used the Parallel Version 16 trial to install it. however it is slow AF (i installed it on an external usb 3 drive) so I ordered a bigger SSD for my macbook pro to install it directly on a VM on there. hopefully that helps speed things up.
 

Warbrain

macrumors 603
Original poster
Jun 28, 2004
5,702
293
Chicago, IL
I found a solution today. I removed the previous clean install on a different container and attempted reinstalling again. Went without a hitch this time.
 
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