Press both “Option and Spacebar” keys on your keyboard. Firstly, open the “Finder” in the dock on your Mac and select the images of your preference. It is luckily very easy to create a slideshow on Mac via using the Option Spacebar. It has inbuilt face recognition software which helps you manage all the photo of the same person. This is free photo management software which can organize your picture perfectly. With all of these features, you can use the trial version to discover all your need for photo manager software. No matter you want the best professional slideshow software, or just some free slideshow maker online, we have you covered! Best Overall- Movavi Slideshow Maker.