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Anirudhb commented on Nov 27, 2020. On a Penryn CPU (Core2Duo), Big Sur installer fails to get to the 2nd stage of installation. The first stage works fine (install bar in recovery), but after reboot it fails and goes into a loop. It starts with 10% on the Apple bar, shows a cursor, goes to 20%, hides the cursor, then reboots. This is what I needed to do. It was bootable from my more recent macbook pro but not from my 2012 macbook air. After repartitioning and setting up the drive again, I could boot to it by choosing a boot drive from inside disk utility in recovery mode. (holding option key wasn't working for me) – Ryan Silva Oct 19 '17 at 23:37.

Apple Inc.'s Macintosh OS X (pronounced 'OS Ten') is the operating system distributed with Apple computers. It includes heavily used several programs by default, including Apple Mail, a web browser called Safari, and an Apple Address Book, and iCal.

• 16Also see
• 17External Links

EFI boot

The firmware is responsible for initializing the hardware and performing a POST (Power-On Self Test). Telestream switch (free version.

The default boot volume is stored in NVRAM and can be configured through the 'Startup Disk' preference pane or the nvram command line utility [1]. E.g. to print all of the firmware variables.

Additional boot arguments can be provided via the 'boot-args' value [2].

Mac OS X extends EFI with a read-only HFS+ driver. According to [3] HFS+ volume header fields are used to point to a 'blessed file' to be loaded as an EFI application. Though it is not clear which header field the source is referring to but likely related to the 'bless' utility [4].

The firmware starts the Mac OS X boot loader (boot.efi). The bootloader displays a dark grey Apple logo on the screen and loads the Darwin kernel from disk, as well as the essential driver extensions.

The bootloader can be eithe a MZ-PE/COFF or EFI fat binary type executables and is commonly stored in:

The behavior of the bootloader can be configured in the com.apple.Boot.plist [5] which can be found in:

Disk image types

Mac OS X has support for various disk image types build-in, some of which are:

• read-write disk image (.dmg) some of which use the Raw Image Format

Burn Folder

Mac OS X Burn Folder:

This folder normally contains alias files (similar to LNK files under Windows). Which should have the following signature.

These alias files contain additional date and time values.

Also check the following files for references to deleted .fpbf paths:

Actual burning of optical media is logged in:

HFS/HFS+ date and time values

In HFS+ date and time values are stored in an unsigned 32-bit integer containing the number of seconds since January 1, 1904 at 00:00:00 (midnight) UTC (GMT). This is slightly different from HFS where the date and time value are stored using the local time. The maximum representable date is February 6, 2040 at 06:28:15 UTC (GMT). The date values do not account for leap seconds. They do include a leap day in every year that is evenly divisible by four. This is sufficient given that the range of representable dates does not contain 1900 or 2100, neither of which have leap days. Also see: Technical Note TN1150 - HFS Plus Volume Format

Converting HFS/HFS+ date and time values with Python:

Launch Agents

System-wide: Microsoft office 2011 free download for windows 7 torrent.

Per user:

These directories contain Property list (plist) files.

Launch Daemons

System-wide:

These directories contain Property list (plist) files.

Startup Items

Crash Reporter

Contains text files named .crash, .diag, .spin

Diagnostic Reports

Internet Plug-Ins

System-wide:

Per user:

Quarantine event database

See [6]

Snow Leopard and earlier

Lion and later

sleepimage

This file is similar to the hibernation file on Windows.

Also see: [7]

Last shutdown logs

Folder Mode Bless Boot Dmg Windows 7

Package Files (.PKG)

Package Files (.PKG) are XAR archives [8] that contain a cpio archive and metadata [9].

Codepages

Mac OS X typically uses UTF-16 big-endian to store Unicode strings, it also defines several codepages [10] that can be used to store ASCII strings.

Note that some of these codepages can differ for different versions of Mac OS.

Also see

Formats

External Links

• Inside Macintosh, by Apple Computer, Inc., 1993
• What is Mac OS X?, by Amit Singh, 1994
• Mac OS X Forensics, by Joaquin Moreno Garijo, March 4, 2015
• Hidden backdoor API to root privileges in Apple OS X, by Emil Kvarnhammar, April 9, 2015
• Max OS X Internals book (1st ed) by Jonathan Levin PDF download

Alias

• Reversing Mac Alias v3 Data Objects, by Patrick Olsen, August 15, 2016

Apple Examiner

• Macintosh Forensics - A Guide for the Forensically Sound Examination of a Macintosh Computer by Ryan R. Kubasiak

EFI

• The Intel Mac boot process, by the rEFIt project
• Carving up EFI fat binaries, by snare, February 24, 2012

iCloud

Folder Mode Bless Boot Dmg Windows 10

ColorSync

• ICC.1:2004-10 - Image technology colour management - Architecture, profile format, and data structure, by International Color Consortium (ICC)
• ICC Profile Format Specification, by International Color Consortium (ICC), November 20, 1995

DMG

HFS

• Mac Forensics: Mac OS X and the HFS+ File System by P. Craiger

Quarantine event database

Unified logging

• New macOS Sierra (10.12) Forensic Artifacts – Introducing Unified Logging, by Sarah Edwards, November 13, 2016
• Accessing Unified Logs From an Image, by BlackBag Technologies, Inc., Sepember 22, 2017

Yet Another Assembler (YAA)

• YAA: An Obscure MacOS Compressed File Format, by nightwatchcyber, June 14, 2020

Posted October 10, 2007 by David Kirk in Apple Mac

Installing OS X from a DMG file can be difficult. With leopard testing and development, many people are having troubles installing from the supplied binary. Here is how it can be accomplished.

Installing OS X from a dmg file format instead of a DVD/CD format seems challenging. Here is how it can be accomplished.

1. Burn it to Dual Layer DVD

OS X is too large to fit on a single layer DVD; however, many macbooks support burning dual layer DVDs. The media is expensive, but for many people this is the easiest option.

Burn it and reboot to it. The OS X will install.

2. Restore the dmg file to an external device

An external hard drive or an iPod in hard disk mode will serve as an excellent booting device as well.

– Copy your dmg file to your current apple desktop.
– In the Utilities Folder in your Applications Folder select Disk Utility
– Select your external device in the left column of the utility
– Click the Restore button
– Drag your dmg to your Source textbox
– Drag your device from the left column to the Destination textbox
– Click the Restore

You will lose any information you have in your external device in this process. After the dmg is restored to the external device, change your boot disk to this device and reboot. Typing of the dead overkill.

Folder Mode Bless Boot Dmg

Dragging the source and destination files can be a little confusing. Click the picture below for a larger version.

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