Can I select which photos on my Mac are uploaded to iCloud or do they all get uploaded automatically?

[iMore Question]

I only want images in Mac Photos OS X to be uploaded to Apple iCloud. I have thousands of other images stored in separate folders in the Documents folder on my Mac which I do NOT want to be uploaded to iCloud.

 

[MaxSmarties]

If you don't import photos on OS X Photos app, they won't be uploaded to iCloud.