Combine multiple iPhoto libraries into new Photos app?
Have 5 separate iPhoto libraries - accumulated over 10 years, with nearly 10,000 images.
When OX 10.10.3 replaced iPhoto with "Photos", it only converted the most-recently used iPhoto library (years 2014-2015).
Old iPhoto libraries are still accessible. What is the safest way to add the remaining 4 libraries into the new (local) "System Photo Library" ?
I prefer not to use the iCloud Photo Library, because I do not need all 10,000 images to be "available" on all my devices - just the last 2-4 years.
Therefore, I prefer just to use iCloud Sharing, for selected sets of images.
Is this possible, with current applications?
27" iMac w/Retina display; OS 10.10.3; iPhoto 9.6.1; Photos 1.0
iMac, OS X Yosemite (10.10.3), 27" Retina Display; Trackpad/Mouse