How can I delete an album?

Launch the Photos app.

If your Albums are not displayed in the left sidebar, hover the cursor over the "Albums" label there and then click Show when that appears. Then you can right-click and delete the particular album there in the sidebar.

Photos User Guide for Mac - Apple Support

KirklandUser Said:

"How can I delete an album?"

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Try the Following:

1. Hold Down: the Control key
2. Click: the album
3. Select: Delete Album

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