![]() (As an experiment, I followed identical steps to created APM- and GPT-flavored install ISOs for macOS Big Sur and tried booting them with VMware Fusion, and only the APM-flavored installer could boot. Go to the developers website here (or use the direct download link from Dropbox here) and download the latest version of Recovery Partition Creator, it’s an AppleScript that will handle the recreation of the recovery drive After the app has downloaded, right-click on Recovery Partition Creator. The default when formatting a disk with Disk Utility in macOS Monterey is GPT, though, so this is likely what most people use. GrandPerspective uses a tree map for visualization which isnt quite as easy. Step 3: Select the drive in Disk Utility. Locate Disk Utility in Applications > Utilities and open it. Note that the createinstallmedia tool keeps the existing partition map flavor of the target disk, and Apple's KB articles indicate no preference for one over the other. Its one of the few tools that can detect disk hogging snapshots on macOS. You’ll use OS X’s Disk Utility app to format the drive. So perhaps APM was considered a more broadly compatible format. Starting with OS X Tiger, both APM and GUID partitions can be used for accessing volumes, but PowerPC-based Macs can only boot from APM disks. When you erase and format a storage device in Disk Utility on Mac, you’re asked to choose a scheme to use. Apple Partition Map Used on disks formatted for use with 68k and PowerPC Macs, the Apple Partition Map is the scheme that defines how the data is organized. ![]() And years ago there was briefly an incompatibility with VirtualBox when using GPT-formatted install media. Partition schemes available in Disk Utility on Mac. For all modern Macs, GUID Partition Map is the only choice and it nearly never needs to be changed Master Boot Partition is useful for cross-platform drives that can be mounted in Windows and in. Some decades old blogs also note that GPT disks are not compatible with PowerPC Macs, and very old versions of macOS (prior to 10.4.2) do not understand GPT partition maps at all. create -help lists all supported layouts. ![]() Unless overridden by -fs, the default layout is GPTSPUD (PPC systems Although the changes between Big Sur and Monterey may seem. To review those of earlier versions of macOS, see this article. This article summarises the volume layouts used in Monterey 12.1. Will be created, with either slice 1 (GPT) or slice 2 (APM) as the data The last few major releases of macOS have brought structural changes to the layout of boot disks, and M1 series Macs are quite different from Intel models. GPTSPUD creates a similar image but with a SPUD causes a DDM and an Apple Partition Scheme partition map with a Here, -layout SPUD creates the disk image with an Apple Partition Map, rather than the default, more modern GUID Partition Table. Several guides to creating disk images of macOS install media (using the createinstallmedia command) recommend creating the disk image like this: hdiutil create \
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