macos – softwareupdate is caught on “discovering obtainable software program”

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I’ve a 2019 iMac which is at present operating Catalina (10.15.7). This OS was restored from a time machine backup a number of months in the past after my direct OS improve (to Sonoma) failed.

I have to improve my OS, this time I’m making an attempt an incremental replace. My first try was to make use of the app retailer hyperlinks right here – I attempted each Huge Sur and Monterey. The Software program Replace UI window opens, however will get caught on “Discovering Replace”.

Subsequent I attempted from command line:
$ sofwareupdate -l --product-types macOS. This additionally will get caught on “Discovering obtainable software program”. I appeared for errors associated to softwareupdate within the console, however didn’t see something trying like an error.

Surprisingly, once I take a look at the historical past, softwareupdate does appear to have downloaded Monterey and Sonoma up to now, however not not too long ago (since my time machine restore):

$ softwareupdate --history | grep macOS
macOS Sonoma                                       14.3.1     02/24/2024, 21:49:10  
macOS Monterey                                     12.6.3     01/23/2023, 13:33:32  
macOS Monterey                                     12.6.1     12/05/2022, 18:24:52  
macOS Monterey                                     12.6       10/21/2022, 13:15:06  
macOS Catalina Safety Replace 2022-005            10.15.7    07/30/2022, 02:12:31

Is there a solution to see what’s mistaken with my present software program replace course of? Or a distinct solution to set up a more moderen OS model?