I don't have an iPhone can't I apply for an apple card on my MacBook Pro?

Yes you can. There is a new option to do that. See the details in Apply for Apple Card online when you buy a product with monthly installments - Apple Support

That is also true if you have an iPhone. It is currently an eligibility requirement for the Apple Card. See: How to apply for Apple Card - Apple Support

You can only apply online if you are buying something utilizing the monthly installment purchase program. Apply for Apple Card online when you buy a product with monthly installments - Apple Support

Thanks for the additional information.