I've updated my operating system from Sierra to Catalina and now I can't open my iPhoto, What do I do?

iPhoto was dropped about 5 years ago by Apple and replaced with the Photos app

which comes as standard with the macs operating system. iPhoto continued to

work with OS's until Catalina, as Catalina does not run 32bit apps which you should

have known before upgrading.

You can import your iPhotos library to the Photos app.

Look for the Photos app icon in your Dock, or if it is not in the Dock it will also be in your

Applications folder.

Press and hold the option/ alt key down while opening Photos, you will see

a Choose Library dialogue, select your iPhoto library and press the button

Choose Library. Your iPhoto images will now be imported for use in the

Photos app.