How long might Photos take opening a 563 GB iPhoto Library in Photos for first time in El Capitan?
After successfully copying my 563 GB iPhoto Library to an external drive so I have a back-up, I'm finding it's taking forever to import/convert the original iPhoto Library for first time into Photos. I started process then had to leave. When I returned 5 hours later, I was 59% of the way through the "Preparing Library" stage. But I'm still at "Preparing Library... 59% complete" a full two hours after that. Worried "import" might have stopped. However Activity Monitor shows some Photos activity, second most of CPU usage. Am running El Capitan on an iMac Retina, Late 2014 w/3 TB HD fusion drive (almost 2 TB free) with 16 GB RAM.
Is this Photos normally this slow when opening up a big iPhotos v. 9.6.1 Library for the first time?
TIA
iMac 27″, OS X 10.11