- MAC OS DISK UTILITY MISSING INSTALL
- MAC OS DISK UTILITY MISSING UPDATE
- MAC OS DISK UTILITY MISSING FULL
- MAC OS DISK UTILITY MISSING MAC
- MAC OS DISK UTILITY MISSING WINDOWS
If you get a fundamentally different picture stop here. The first 3 sectors of a JHFS+ partition look like this: The first 3 sectors of a CoreStorage partition look like this:
Re-check the correct sector by entering the offset (marked red) in the Calculator and divide it through 512. Sometimes you have do that twice to jump to the correct sector. Then hit the "Go to offset"-button (marked with the green circle) and enter 409640 exactly like in the picture below. Please try to arrange the wxHe圎ditor window like in the examples below with straight red lines. The disk should have further partitions (disk0s1 - disk0s5). In the menubar go to "Devices" -> "Open disk device" -> choose the appropriate diskNumber. Check that you work in read-only mode ("Options" -> "File mode" -> "Read only"). Enter everything manually! You might accidentally write directly to your disk.įirst you have to determine, if you had a JHFS+ or CoreStorage partition at index number 2.
Hint: While working with wxHe圎ditor don't use copy and paste.
Since the start block of a main partition and the size of a recovery partition have fixed sizes/boundaries you can usually calculate the proper GUID partition entries of your old partition(s). The approach is similar as in my answer here: HFS+ invalid number of allocation blocks Don't initialize any "unknown" volumes if asked.ĭetect the start block and type of your old OS X volume and the start block of your old Recovery HD with wxHe圎ditor:
MAC OS DISK UTILITY MISSING INSTALL
Open Restore OS X and install OS X to the partition TempSystem.Exit Terminal by entering exit and quit it.Newfs_hfs -v "Recovery HD" -J /dev/disk0s5 Newfs_hfs -v "TempSystem" -J /dev/disk0s4 #use the proper partition found in diskutil list. Now you have to format the new partitions: diskutil list
MAC OS DISK UTILITY MISSING WINDOWS
gpt add -b 409640 -i 2 -s 488083416 -t FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF /dev/disk0Īdd new partitions in the (old) Windows part of your disk. This will destroy the content of the Windows partition(s).Īdd a new partition in the (old) OS X part of your disk to protect it. Now you can either guess the old content of the GUID partition table or you can install OS X to a new partiton - without overwriting your old OS X partitions - and try to detect the sizes of the old partitions with appropriate tools (like Test Disk/wxHe圎ditor). Now replace the MBR by a GUID partition table: diskutil umountDisk /dev/disk0ĭd if=/dev/random of=/dev/disk0 count=1 bs=512Īdd the EFI partition in the partition table: gpt add -b 40 -i 1 -s 409600 -t C12A7328-F81F-11D2-BA4B-00A0C93EC93B /dev/disk0 dev/disk1.~/dev/disk12 belong to the recovery system You should get the following output (the types may be different in your diskutil listing: -bash-3.2# diskutil listĠ: FDisk_partition_scheme *500.0 GB disk0 In the commands below I assume the disk identifier is disk0. Remove the MBR and modify the GUID partition tableĮnter diskutil list and gpt -r show /dev/diskX (with diskX: the disk identifier of your internal disk (probably disk0) to get an overview.
MAC OS DISK UTILITY MISSING FULL
If you boot to a full system and login as admin you have to prepend sudo to execute some commands like gpt.
MAC OS DISK UTILITY MISSING MAC
If you are restricted to WIFI and the boot process fails, just restart your Mac until you succeed booting.Īlternatively you may start from a bootable installer thumb drive (preferably Yosemite or El Capitan) or a thumb drive containing a full system (preferably Yosemite or El Capitan). I recommend ethernet because it's more reliable. On a 50 Mbps-line it takes about 4 min (presenting a small animated globe) to boot into a recovery netboot image which usually is loaded from an Apple/Akamai server.
MAC OS DISK UTILITY MISSING UPDATE
The prerequisites are the latest firmware update installed, either ethernet or WLAN (WPA/WPA2) and a router with DHCP activated. Restart to Internet Recovery Mode by pressing alt cmd R at startup. The answer below is NOT intended for users WITH a thumb drive or an external disk! If you have one of those devices much easier solutions exist. The particular obstacle here is: the OP neither has a thumb drive nor a second Mac or an external drive. This usually only effects the partition table but not the content of your disk (though it seems to be gone)! To restore a proper GUID partition table, the MBR has to be deleted and a proper GUID partition table has to be restored. Windows' Disk Management has overwritten the GUID partition table with an MBR partition table.