Picasa is a program developed by Google, Inc. whose function is to allow the user view and organize the pictures in his/her Mac.
Picasa searches for all the images in your HD and shows them on an eye-catching and intuitive interface. Without any doubt, the presentation is one of the high points of this applications.
It includes some advanced features really easy to use. Picasa allows you to burn your pictures in a CD and it creates slideshows on fullscreen.
You can configure the printing options as you desire and allows you to extract the photos from your digital camera. Now, and thanks to Picasa you will have the album you desired and you will be able to see your photos anytime you want.

Picasa for Mac can transfer, find, organize, share, print, and edit images, all with this easy-to-use product. Watch Picasa automatically organize all your pictures into elegant albums by date. Having all your photos in one place means no more time wasted searching for folders or files. The program works with JPEG, GIF, BMP, PSD, and movie files and is compatible with most digital cameras; it detects your USB driver and imports pictures into albums.
Features and Highlights
Share and name tags on Google+
If you've joined Google+, you can use Picasa for macOS to share directly to the circles you've created in Google+. With the release of the software, you can now upload and share your name tags on Google+. Note that if you choose not to join Google+, name tags won't change at all.
Beautiful web albums
Show your photos at their best. View full-screen slideshows, see your pictures arranged on a global map, enjoy video playback, and more.
Sharing made simple
Publish your favorite photos online with one click. Create stunning online photo albums to share with friends and family, or public albums for the world to see. Get notified when your 'Favorites' post new photos.
Focus on people
People matter in your photos. This technology helps you automatically organize your photos based on the people in them, and works in the tool and the app Web Albums.
Edit to perfection
Improve almost any picture with the tool's one-click fixes for common problems like red-eye, color, and lighting. Or, use tuning and effects to make your best photos look even better.
Get organized
Picasa for Mac automatically finds all the photos on your PC, wherever they are and will organize them in seconds.
Add places
Easily add geo-tags to your photos so that you can remember exactly where they're from using Google Maps.
It's free to use
The app is free to download, and Picasa Web Albums provides 1 gigabyte of free storage -- that's enough space for 4,000 wallpaper-size photos.
Note: The application is not developed actively anymore.
Also Available: Download Picasa for Windows