I try to upgrade my MacBook OS from High Sierra (10.13.6) to either Catalina or Big Sur but after agreeing the software license agreement I get a pop-up message saying Checking "(null)"... and nothing happens. At both of the OS upgrades.
Any idea how to get this tackled without coding?
thx
The installers are placed in the Applications folder, and the recent installers are all named Install macOS {version}.
Some users do relocate the installers elsewhere, and the bootable installers are inherently located elsewhere, though that location does not matter for the installation or upgrade.
It would appear that the installer download was corrupted, or incomplete.
Common culprits for weird problems are add-on anti-malware and anti-virus apps, add-on cleaner apps, and add-on VPN client apps.
Look around for an existing installer around, and then re-download the installer. Finder allows searches for filenames containing strings, and enter Install in the search box and select name from the drop-down. (I've had a few cases here were some old get was sitting on an external storage device somewhere, and download was stale or busted or otherwise, but the Mac App Store still found it.) Details > Narrow your search results on Mac - Apple Support
Failing the above... Boot into Safe Mode, and try the same sequence again. You may or will need to download the installer again. Safe Mode info > How to use safe mode on your Mac - Apple Support
You will want to use Safari (just) for accessing the kit download, if (when) you re-download it.
Download links >
are these folders I need to move to bin to free up space?
Looks like, but do a Get Info on them to see what size they are. :)
it's not that, they are only kB size folders and I look for GBs :(
Another great tool my friend...
Find Any File...
http://apps.tempel.org/FindAnyFile/index.php
Hold Option or alt key when selecting Find to Find All.
Take care! :)
Yes, it is in good shape.
My macbook is a used one and was cleaned and eraesed last week. The original macOS has been reinstalled which is High Sierra (Shift-Option-Command-R).
I tried to upgrade to Big Sur but failed, then tried to Catalina, also failed. However, the upgrade to Mojave was successful, then I tried again to Catalina and later to Big Sur but both failed again with Checking "(null)"...
Someone suggested in a forum to try Option-Command-R startup and install Big Sur with it and it worked, it went through successfully last night.
My problem now is that all the failed attempt has left behind the install files (I suppose) and it eats ca. 40 GB from my disk and I can´t find how to remove them to free up space.
Is there any apple tool for that or can I find it anywhere in the settings?
checking "(null)"... and stuck
