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Question: Mac OS does not start

MacBook-Pro-Rezerv:~ rezerv$ diskutil cs list

No CoreStorage logical volume groups found

MacBook-Pro-Rezerv:~ rezerv$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *251.0 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS 200.1 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Apple_HFS 49.9 GB disk0s4


/dev/disk1 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *128.0 GB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_HFS Corall-Collor 127.2 GB disk1s2

3: Apple_Boot Recovery HD 650.0 MB disk1s3


MacBook-Pro-Rezerv:~ rezerv$ diskutil cs list

No CoreStorage logical volume groups found

MacBook-Pro-Rezerv:~ rezerv$

MacBook Pro with Retina display, macOS Sierra (10.12.6)

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Mar 5, 2018 10:50 AM in response to Corall-Collor In response to Corall-Collor

Reinstall El Capitan or Later Without Erasing Drive


Please be sure you back up.


  1. Restart the computer. Immediately after the chime hold down the Command and R keys until the Utility Menu appears.
  2. Select Disk Utility and click on the Continue button.
  3. Select the indented (usually, Macintosh HD) volume entry from the side list.
  4. Click on the First Aid icon in the toolbar. Wait until the Done button activates, then click on it.
  5. Quit Disk Utility and return to the Utility Menu.
  6. Select Install OS X and click on the Continue button.


If the above is unsuccessful then do the following:


Install El Capitan or Later from Scratch


If possible backup your files.


  1. Restart the computer. Immediately after the chime hold down the CommandandRkeys until the Apple logo appears. When the Utility Menu appears:
  2. Select Disk Utility from the Utility Menu and click on Continue button.
  3. When Disk Utility loads select the volume (indented entry, usually Macintosh HD) from the Device list.
  4. Click on the Erase icon in Disk Utility's main window. A panel will drop down.
  5. Set the Format type to APFS (SSDs only) or Mac OS Extended (Journaled.)
  6. Click on the Apply button, then wait for the Done button to activate and click on it.
  7. Quit Disk Utility and return to the Utility Menu.
  8. Select Install OS X and click on the Continue button.


This will install the version of OS X you had installed.

Mar 5, 2018 10:50 AM

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Mar 5, 2018 12:08 PM in response to Corall-Collor In response to Corall-Collor

What are those two ghosted indented entries? I don't read your language, so translate, please. Your second image looks like you reformatted the SSD but no volume entry.


Internet/Network Recovery of El Capitan or Later on a Clean Disk


  1. Restart the computer. Immediately after the chime hold down the (Command-Option-R) keys until a globe appears.
  2. The Utility Menu will appear in from 5-20 minutes. Be patient.
  3. Select Disk Utility and click on the Continue button.
  4. When Disk Utility loads select the drive (usually, the out-dented entry) from the side list.
  5. Click on the Erase tab in Disk Utility's main window. A panel will drop down.
  6. Set the partition scheme to GUID.
  7. Set the Format type to APFS (SSDs only) or Mac OS Extended (Journaled.)
  8. Click on the Apply button, then click on the Done button when it activates.
  9. Quit Disk Utility and return to the Utility Menu.
  10. Select Reinstall OS X and click on the Continue button.


Note:

1. To install the version of OS X that was currently installed use Command-Option-R.

2. To install the original factory version when the computer was new use Command-Option-Shift-R.

Mar 5, 2018 12:08 PM

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Question: Mac OS does not start