how to delete large numbers of emails on my MacBook air

As Axel Foley states, we need more details.

If, for example, “large numbers” really means “all”, then Command-A may work.

Mac keyboard shortcuts - Apple Support

Hi Jim,

This Apple Community Forum is made up of users just like you and is only allowed to address issues with Apple products and apps. Your AOL app is owned by AOL and your question, therefore, should be directed to AOL's tech support.

You can start that process by clicking here https://help.aol.com/contact

Good Luck.

Axel F.

How are the emails currently stored on your Mac? Which software are you using to manage your emails? Need some more details so that we can provide the correct guidance.

Axel F.