Q: Iphoto & el capitan

Have you opened Photos?

In El Capitan, iPhoto has been replaced by a brand new app named Photos. When you first launch it from the Dock, it will migrate your iPhoto Library to a Photos Library, Thereafter, you use Photos.

https://help.apple.com/photos/mac/1.0/?lang=en

Updating from iPhoto to Photos for OS X - Apple Support

SuprBonBon wrote:

 

Yes. When I plug my phone into my computer it opens but does not give me the option to download my pics off of it, like it use to with iPhoto. I have thousands of pics I want on my computer not in a cloud.

Verify your settings

Photos>Preferences>General>Importing √ Copy Items to PhotoLibrary

Photos>Preferences>iCloud>√ Photo Stream

Import photos and videos from your iPhone, iPad, or iPod touch - Apple Support

About the 'Trust This Computer' alert on your iPhone, iPad, or iPod touch - Apple Support

on your iphone:

Settings > General > Reset > Reset Location & Privacy. Now when you connect to formerly trusted computers, the Trust alert will ask you whether you trust that computer.

See the "Import to your Mac" section:

Import photos and videos from your iPhone, iPad, or iPod touch - Apple Support