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

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

I must improve my OS, this time I’m attempting an incremental replace. My first try was to make use of the app retailer hyperlinks right here – I attempted each Large 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 accessible software program”. I regarded for errors associated to softwareupdate within the console, however didn’t see something trying like an error.

Surprisingly, after I take a look at the historical past, softwareupdate does appear to have downloaded Monterey and Sonoma previously, however not lately (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 technique to see what’s flawed with my present software program replace course of? Or a unique technique to set up a more recent OS model?