Q: Finding backed up data

Hi, c23sharp.  

Thank you for visiting Apple Support Communities.  

I understand that you backed up your iPhone to your MacBook Pro and want to know the location of the data.  Could you elaborate on what data you want locate?  If you are looking for the location of your iOS backup or want to know what is stored in your backup, here are a couple articles that you will find helpful.  

About backups in iCloud and iTunes

Find and manage your iTunes backups

Cheers