MacMost: Photoshop

How To Use PhotoShop Layers In Final Cut Pro
3/15/19
If you want to use complex graphics or create an animation in Final Cut Pro, you can build your image in Photoshop or another advanced image editing app that supports layers. You can then import that layered document into Final Cut Pro and access the layers. You can apply changes and effects to each layer, or use them to animate portions of the images.
MacMost Now 893: Editing Photos In External Editors
7/19/13
You can set iPhoto and Aperture to use an external app to edit photos instead of merely using the adjustment and filter editing in the apps. You can set iPhoto to use Pixelmator, but Photoshop works more smoothly when trying to save back into your library.