Hello Frnz

I want to  purchase a 1 TB external hard disk for my Macbook Pro OS X 10.10.3 Yosemite. All those hard drive which are supporting Mac OS X: Leopard, Snow Leopard, Lion, Mountain Lion, will support Yosemite or not. Can I purchase this type of hard drive or not.

Please help me.

Thank you

Welcome to the Community.

The following link contains a list of Mac-ready WD portable hard drives. They all support Mac OS 10.10 Yosemite.