Boot Camp Assistant User Guide
Restore an APFS partition from Time Machine backup. Click on the Apple logo at the top left corner of your screen and select 'Restart'. When your Mac boots up and hear the startup chime, you need to immediately hold down the Command + R keys. After booting your Mac into macOS Recovery mode, you will see a window named macOS Utilities. Mac OS X has a pretty solid disk utility for scenarios where you might want to create, resize or delete or modify new or existing partitions. However, in rare cases, the utility might not be as.
You must use Boot Camp Assistant to remove Windows, or a partition that was created with Boot Camp Assistant, from your Intel-based Mac.
WARNING: Do not use any other utilities to remove Windows or a partition that was created with Boot Camp.
Start up your Mac in macOS.
Back up all important data stored on your Windows partition before you remove Windows.
WARNING: When Windows is removed, the Windows partition—as well as all data stored in the partition—will be erased permanently.
Quit all open apps and log out any other users.
Open Boot Camp Assistant , then click Continue.
If the Select Tasks step appears, select “Remove Windows 10 or later version,” then click Continue.
Do one of the following:
If your Mac has a single internal disk, click Restore.
If your Mac has multiple internal disks, select the Windows disk, select “Restore disk to a single macOS partition,” then click Continue.
A Microsoft Reserved Partition (MSR) is a partition of a data storage device, which is created to reserve a portion of disk space for possible subsequent use by a Windowsoperating system installed on a separate partition. No meaningful data is stored within the MSR; though from the MSR, chunks may be taken for the creation of new partitions, which themselves may contain data structures.[1]
The GUID Partition Table (GPT) label for this partition type is E3C9E316-0B5C-4DB8-817D-F92DF00215AE.[2]
Purpose[edit]
Formerly, on disks formatted using the master boot record (MBR) partition layout, certain software components used hidden sectors of the disk for data storage purposes. For example, the Logical Disk Manager (LDM), on dynamic disks, stores metadata in a 1 MB area at the end of the disk which is not allocated to any partition.[3]
The UEFI specification does not allow hidden sectors on GPT-formatted disks. Microsoft reserves a chunk of disk space using this MSR partition type, to provide an alternative data storage space for such software components which previously may have used hidden sectors on MBR formatted disks.[1]Such software components can create a small software-component specific partition from a portion of the space reserved in the MSR partition.[citation needed]
Size[edit]
The starting size of an MSR depends on disk size and usually aligns with the following table. This size gets reduced as portions of the MSR are taken to be used, as described above.
| Disk size | MSR size |
|---|---|
| Less than 16 GB | 32 MB (32 × 220 bytes) |
| Greater than 16 GB | 128 MB |
Beginning in Windows 10, the minimum size of the MSR is 16 MB which the installer allocates by default.[4]
Location[edit]
Remove Microsoft Reserved Partition Mac Drive
The MSR should be located after the EFI System Partition (ESP) and any OEM service partitions, but it must be located before any primary partitions of bootableWindowsoperating systems.[1] Microsoft expects an MSR to be present on every GPT disk, and recommends it to be created as the disk is initially partitioned.[5]
See also[edit]
Can I Delete Microsoft Reserved Partition
- Basic data partition (BDP)
- EFI System Partition (ESP)
References[edit]
- ^ abc'Windows and GPT FAQ - Windows 10 hardware dev'. msdn.microsoft.com. 1 June 2017. Retrieved 12 December 2020.
- ^'PARTITION_INFORMATION_GPT structure (winioctl.h)'. docs.microsoft.com. 5 December 2018. Retrieved 14 December 2020.
- ^'How Dynamic Disks and Volumes Work'. technet.microsoft.com. 8 October 2009. Retrieved 14 December 2020.
- ^'UEFI/GPT-based hard drive partitions'. docs.microsoft.com. 2 May 2017. Retrieved 14 December 2020.
- ^'Recommended UEFI-Based Disk-Partition Configurations'. docs.microsoft.com. 30 October 2012. Retrieved 14 December 2020.