iMac 5K does NOT see 11.5.2 update with 11.5.1
My new iMac (and my last year's iMac too) won't find the 11.5.2 update with 11.5.1 installed. So far, the only solution I see is to redownload the entire Big Sur installer and update everything. This is time consuming and tedious, and shouldn't be necessary. What is happening and why?