How can I open a .dmg file?
To extract it, it is much easier to use 7zip:
7z x file.dmg
Install dmg2img .
Next, read the package information page and the manual page to see if it is useful to you.
The application seems to convert .dmg to a file that can be mounted using the mount
command:
dmg2img file.dmg imagefile.img
From your Wikipedia article, the next command seems to be available to do that:
sudo mount -o loop -t hfsplus imagefile.img /mnt
In this way, the file imagefile.img
is a result from dmg2iso
and the contents will be available at /mnt
. If the hfsplus type is not detected, you might need to load the kernel module for it:
sudo modprobe hfsplus
When done, you can unmount it by running:
sudo umount /mnt
This works for me:
- Extract using
7z x
- Locate the
hfs
partition file - Mount it to a directory
Extract using 7z x
root # aptitude install p7zip-full
root # 7z x ../mysql-5.5.28-osx10.6-x86_64.dmg
7-Zip [64] 9.20 Copyright (c) 1999-2010 Igor Pavlov 2010-11-18
p7zip Version 9.20 (locale=en_IN,Utf16=on,HugeFiles=on,4 CPUs)
Processing archive: ../mysql-5.5.28-osx10.6-x86_64.dmg
Extracting 0.MBR
Extracting 1.Primary GPT Header
Extracting 2.Primary GPT Table
Extracting 3.free
Extracting 4.hfs
Extracting 5.free
Extracting 6.Backup GPT Table
Extracting 7.Backup GPT Header
Everything is Ok
Files: 8
Size: 125475840
Compressed: 117543935
root # ls
0.MBR 1.Primary GPT Header 2.Primary GPT Table 3.free 4.hfs 5.free 6.Backup GPT Table 7.Backup GPT Header
Locate the hfs
partition ( here it is 4.hfs
file ):
root # ls -l
total 122548
-rw-r--r-- 1 root root 512 Feb 5 16:06 0.MBR
-rw-r--r-- 1 root root 512 Feb 5 16:06 1.Primary GPT Header
-rw-r--r-- 1 root root 16384 Feb 5 16:06 2.Primary GPT Table
-rw-r--r-- 1 root root 3072 Feb 5 16:06 3.free
-rw-r--r-- 1 root root 125435904 Feb 5 16:06 4.hfs
-rw-r--r-- 1 root root 2560 Feb 5 16:06 5.free
-rw-r--r-- 1 root root 16384 Feb 5 16:06 6.Backup GPT Table
-rw-r--r-- 1 root root 512 Feb 5 16:06 7.Backup GPT Header
Mount it to folder:
root # mkdir t
root # mount -oloop 4.hfs t
root # cd t/
root # ls
mysql-5.5.28-osx10.6-x86_64.pkg MySQL.prefPane MySQLStartupItem.pkg ReadMe.txt