Email photos and videos stored in iCloud
To send photos and videos from iCloud Photos by email, you need an iCloud Mail account. See Create an email address in iCloud Mail.
In the Photos app on your Mac, open an album or folder to select the photos and videos you want to email, or double-click a single photo or video.
Click the Share button , then choose Mail.
A new email window opens with your photos or videos attached.
Add recipients and an optional subject and message, then click Send in the upper-right corner of the email window.
Photos uses your iCloud email account to send photos and videos. Attachments are limited in size to a total of 20 MB per email.
Note: If you send an email with large photos and videos attached, it might be returned by the recipient’s email service if your email exceeds the size limit set by that email service. You can try sending the photos and videos in multiple email messages. See Add an email attachment in Mail on iCloud.com.