What is iCloud for macOS?

iCloud for macOS is a macOS application produced by Apple that allows you to directly access iCloud services from your macOS computer.

Here is what you can do with iCloud for macOS:

• Safely store your photos and videos in iCloud. With iCloud Photo Library, any new photos and videos that you take on your iPhone, iPad, or iPod touch automatically download to your macOS computer. And you can upload new photos and videos from your macOS computer so that you can access them from your other devices too.
• Use iCloud Photo Sharing to share photos and videos with just the people you choose. Then invite friends to add their own photos, videos, and comments.
• Get your documents on every device you use with iCloud Drive. Simply drag your documents into the iCloud Drive folder on your macOS computer and access them at any time, on any device.
• Keep your iCloud Mail, Contacts, Calendars, and Reminders up to date automatically between your iPhone, iPad, iPod touch, Mac, and macOS computer.
• Keep your Google Chrome, Firefox, or Microsoft Edge bookmarks on macOS the same as your Safari bookmarks.
• Update your iCloud preferences, see how much iCloud storage you're using, delete items to free up storage, and update your storage plan whenever you want.

The picture below shows you Apple iCloud Keynote welcome screen:

⇒ Start and Sign in iCloud for macOS

⇐ Using iCloud for macOS

⇑ Using iCloud for macOS

⇑⇑ Apple iCloud - Frequently Asked Questions