Not all of my iPhoto photos are available when I try to import them into my mac.
I took 132 photos at a 4 day event recently. When I attempted to import them into my mac only 16 of them showed up when I opened iPhoto. When I tried Image Capture the same thing happened. The 15 that showed up for import were spread over all 4 days. My phone is an iPhone 6 with 11.3.1, Photos is 2.0, Image Capture is 6.8.
MacBook Pro, macOS High Sierra (10.13.3)