installation 3.5 frozen

My installation of 3.5 is frozen at “Recomputing database sort key”. It never goes beyond this window (after 2 hours). My database in 3.2.16 was empty as I am setting currently up a new NAS. I am on an older iMac running El Capitan 10.11.6

Moderators you can delete this post. Issue resolved itself after 2.5 hours.