iPhoto library in 3 locations?!?

[oldaudio]

Hello:
I am trying to clean up some space on my old Mac-mini running OS X Yosemite 10.10.5.
When I do a search using "Disk Inventory X", it shows that I have photos in 3 different locations. ( not counting the Time Machine external drive ) How do I tell which one of these photo libraries is the one in use so I can delete the unused ones?
Thanks, Mike

 

[Cory Cooper]

Hello and welcome.

You should be able to hold the Option key down when you launch iPhoto/Photos. A dialog box will appear that will show all available iPhoto Libraries (that it knows of). It should highlight the iPhoto Library that was last used, and show you the path. If you click any of the others once to highlight, it will show you path to them, and allow you to open them instead.

You can also bring up the same window if you choose iPhoto > File > Switch to Library...

C