Trying to reinstall mac OS High Sierra from recovery mode: no permission

zain246 wrote:

hi Leroy, I have done this and fit said "First Aid process has failed. If possible back up the data on this volume." This happened when it was checking the Catalog file. What are my options? Given that something like this happened a few years ago?

Hopefully you have a current backup plan in place.

The drive has failed or the directory structure has become corrupt beyond repair.

You need to erase/reformat the drive reinstall the macOS all this can be done from the recovery, internet Recovery or a bootable USBinstaller. This of course will be a 100% data lose on the drive.

Reformat as GUID/Extended Journaled

macOS Sierra / macOS High Sierra: Erase and reinstall macOS

How to create a bootable installer for macOS - Apple Support

If you have an external boot clone you can boot off that to buy yourself some time, to come to terms—

How to create a boot clone

Do you need any information on this drive?

edit: Try leroydouglas's advice first.

No, I suggest you use disk utility to reformat the drive. all information on the drive will be lost. Should this re-occur, you could have a bad drive. Worried? Replace drive or get an external drive. a drive lasting for five years is a respectable time.

R

What you depends on whether or not you have a backup.

No, backup. "bad"

You need to get an external drive. You need to install macos on the external drive. You then need to try some recovery software and see what data you can get back.

"Stellar Phoenix Macintosh - Mac data recovery software, recovers data from damaged, deleted, or corrupted volumes and even from initialized disks."

They have a trial version, so I guess you can see if your data can be recovered...

http://www.stellarinfo.com/mac-data-recovery.htm

"Data Rescue II is the best data recovery software on the market for recovering files from a problem hard drive. Data Rescue II works when other tools fail. Data Rescue II is also completely safe to use since it does not attempt any risky repairs to the drive while its scanning."

http://www.prosofteng.com/products/data_rescue.php

FileSalvage is an extremely powerful Macintosh application for exploring and recovering deleted files from a drive or volume. FileSalvage is designed to restore files that have:

-- been accidentally deleted.

-- become unreadable due to media faults.

-- been stored on a drive before it was re-initialized/formatted.

http://subrosasoft.com/OSXSoftware/index.php?main_page=product_info&products_id= 1

"TestDisk is a free data recovery utility. It was primarily designed to help recover lost data storage partitions and/or make non-booting disks bootable again when these symptoms are caused by faulty software, certain types of viruses or human error (such as accidentally erasing a partition table)."

http://en.wikipedia.org/wiki/TestDisk

Wondershare Data Recovery for Mac

"Recover lost photos, video, documents, email and archive files from any Mac-based hard drive or external hard drive, iPod, USB drive, SD card, digital camera, mobile phone, and MP3/MP4 player, due to accidental deleting, formatting, virus infection, improper operation, unexpected power failure, and other unknown reasons. Also, iPhone recovery allows you to recover lost photos, videos, SMS, contacts, note, calendar and call history from iTunes backup file. With the free trial, you can preview all your recovered images, videos, music, documents and archive files prior purchasing this Mac Data Recovery."

http://software.bigbigsoft.com/data-recovery-mac

"If there is any chance of recovery at all your best bet is Prosoft Data Recovery." by macjack
https://www.prosofteng.com/datarescue-mac-data-recovery/

Yes. "great"

re-install macos as described above.

R

Boot into Recovery (Command R) and from the dropdown menu: Utilities> Disk Utility> run the First Aid on your Macintosh HD. If errors are found and repaired, run again until no errors reported.


Recovery http://support.apple.com/kb/HT4718