Sonoma Installer hangs on "Validating packages"
For some time now, every run of the installer, regardless of what package is being installed and from whatever source, hangs at the "Validating packages" step. It says "Install time remaining: less than a minute," but it can take up to an hour to continue.
During this time, installd is burning up a lot of CPU, doing something (per Activity Monitor).
Eventually, it completes and everything seems fine, but this isn't not exactly idea.
Again, it's *every* installer, not just a particular one, every time.
Has anyone experienced this before?
iMac 27″