Can I boost RAM on 7th generation IPad to 1 gig?

A 7th gen iPad has 3 GBs of internal processing RAM.

If you are referring to the iPad's internal data storage, internal data storage of any Apple iOS device is of a permanent, fixed amount and cannot ever be increased/expanded.

And NO, you cannot install macOS on any iOS device unless you are trying to do this by jail breaking your iPad.

iPads, iPhones and iPod Touches only run iOS/iPadOS.

Best of Luck to You!

iPad 7th generation should already have 3GB, and they are managed by iPadOS.

Regards

Giulio

You cannot download or install macOS on an iPad.