Solution: If you want to go ahead with the partitioning task, you need to create more space on your hard drive. Problem 1: Sometimes, you cannot access the Mac Disk Utility partition because your hard drive doesn’t have sufficient space. Why Partition Grayed Out in Mac (Plus Solution) About Outbyte, uninstall instructions, EULA, Privacy Policy. Many Apple users who have faced Partition grayed out in Mac issues eventually partitioned their external hard drives with the help of these fixes. In this post, we will guide you through a step-by-step process on how to restore a grayed-out Disk Utility partition. But somehow, you cannot access the Mac Disk Utility partition, so you can’t write data to the drive.įear not, we have a solution to this problem. Probably, you just bought your external hard drive and are eager to use it on your Mac. In a thread on Apple’s support forum, users complain that their Mac Disk Utility partition grayed-out while trying to partition their external hard drives. Hard drive partitioning is a common issue discussed in many tech forums. By default, a Mac runs a different file system, so it may bring issues while partitioning your disk on Disk Utility.

However, the main concern is that most external hard drives and USB keys come formatted for Windows, which is primarily for PCs. Partitioning a disk on a Mac is an effective way to organize your data into different categories.