Your faithful Mac creates the partitions on your external hard drive.īut before we jump straight in, there are some things you need to have in place before you begin. How To Partition An External Hard Drive For Mac And Windows Why Is The Shared Partition For Mac And Windows Created As ExFAT? What Happens When You Plug Your External Hard Drive Into Your Colleague Or Kids Windows PC?.Choosing A File System For Your Partition To Partition The External Hard Drive For Mac And Windows PC Pick The External Hard Drive You're Going To Partition For Mac And Windows You'll Be Using A Piece Of Software Called Disk Utility Creating The Partition for Mac And Windows.How To Partition An External Hard Drive For Mac And Windows.