im trying to migrate my crome book to my mac and im having trouble

You will have to manually copy the files, photos and other data to a USB drive to transfer them to the Mac.

There is no automatic way of migrating data from a Chromebook like there is for Windows.

Apps cannot be transferred, you will need to find Mac compatible replacements.

For things like Gmail emails, contacts, notes and calendar, just log in to your Gmail account in System Preferences->Internet Account. It should then download all that content to the respective apps on the Mac. (Contacts, Notes, Calendar, Mail)