Step 1: Select photos in Finder

Select files in Finder

Step 2: Create a new Keynote document

Click here if you don’t remember how.

Step 3: Drag your photos on Keynote’s sidebar

Drag photos onto Keynote’s sidebar

Step 4: Set your transition time

Set transition times in Keynote

Step 5: There is no step 5. Press ‘Play’, you’re done!

Photo credit: WP_20140319_004 by Khedara ආරියරත්න 蒋龙 under CC-BY-SA