I cannot get into my develop module on lightroom, it is telling me to "please renew my membershipto reactivate the develop module" I do not understand. I bought the software must I pay a membership as well ? Also I do not want to use lightroom mobile and it is trying to sync my photos. I use a MAC
Did you purchased the Full Perpetual License from Adobe for $149.00?, if so then what has happened is that you probably downloaded the Creative Cloud trial version which has now expired.
The license key for the perpetual version will not be accepted to activate the CC version.
Uninstall the existing Lightroom and then download the one available from the link below. The uninstall process will not affect your Catalog, Preferences or personal files but will just remove the application. Install the new download and you license key will be accepted.
If this is not the situation you face then provide some more details.