Notes on MacBook Pro Unibody

Multiple boot

It is possible to have on MPB MacOSX, Windows and a few linux distros. Also, it is not true that when we use Linux/Windows on MBP, we are limited to 3 usable partitions, as often stated in many guides about dual or triple boot on Mac. I don't use MacOSX and Windows very often, but I find it useful to have them installed, they can be very handy to run some applications (Google Sketchup or 12VoIP are good examples).

After many trials and errors, and spending quite some time googling, I found this article. I find it important to know these points:

• Myths and Facts About Intel Macs
• hybrid partition table MBR/GPT and BIOS is required to boot Windows, and also Linux if we want graphics acceleration. The best tool to deal with hybrid partition table MBR/GPT is rEFIT.
• to change the partition table, use GParted Live CD to boot MBP and make desired changes, then use refit to sync the MBR partition table. It's OK that after syncing, the MBR partition table looks different from the GPT table. MBR partition table is needed to boot MBP in BIOS mode and is used by Windows. Linux & MacOSX don't look at MBR partition table (they use the GPT one). It's fairly easy and safe to change the partition table (including grow/shrink partitions) this way if we follow strictly this practice: whenever we change the partition table with GParted, always use rEFIT to sync MBR table from GPT.
• the order how the OSes are installed is critical:
  • MacOSX
  • a small ext2/ext3 partition to install grub
  • Windows. If Windows partition is not in this position, installation goes ok but then it cannot boot (mystery error with missing hal.dll)
  • linux partitions; can be as many as we wish

Partitioning

MBP comes with preinstalled OSX on the whole disk. I made some notes on my partitioning scheme:

Partition	Minimal size	Recommended size	File system	Notes
Leopard	9G	30-40G	HFS+	I don't use MacOSX very often, so I don't need too much disk space for it. It's good to keep the MacOSX partition not too big so that I can backup the whole partition to an external USB disk (mine is 30G). MacOSX can access NTFS, so non-system data (like audio, movies, etc.) can be put on another NTFS partition.
Grub		200MB	ext2	Grub must be installed to this partition (right after the MacOSX partition) so that rEFIT can chainload it. Then we boot linux from grub just like on PC.
WinXP	2G	20G	NTFS	I use WinXP from time to time to run or test software that don't run on other OSes. This partition can be accessed from both linux & OSX, so it's not harmful to give it some more space than needed.
swap	4G	4G	swap	swap is used for linux, and must be as large as RAM amount for use with suspend
Linux1	4G	8G	ext3	primary linux system, at the moment Ubuntu-8.10
Linux2	4G	8G	ext3	testing linux system. It's handy to have an extra partition to install another linux system for testing purpose, so that we can test another linux distro (for example a new version of Ubuntu) without re-partitioning.
/home	40G	grow as needed	jfs	/home partition that is shared between linux systems. jfs cannot shrink so it's better to start small, and expand it as needed. To expand /home partition, use GParted Live CD to shrink the share partition (below) and then expand /home. GParted can grow/shrink/move NTFS without problem.
share	10G	grow/shrink as needed	NTFS	NTFS can be accessed from Windows, MacOSX and Linux so it's a good choice for data that are likely to be shared between systems, like photos, audio, video, iso images, downloaded programs, etc. Ironically, we cannot access this partition from WinXP, since Windows uses MBR partition table and hence cannot see this share partition. But it's still the best choice for sharing data between MacOSX and Linux.

Installation steps

• start MacOSX, download and install rEFIT from http://refit.sourceforge.net/
• use BootCamp to resize MacOSX partition to 40G. Don't worry about the windows partition size, we will delete it later
• boot MBP with GParted Live CD (version 0.3.7-7 works ok, version 0.4.1-2 has problem with screen resolution which must be fixed by manual configuration: resolution 1024x768, driver VESA)
• create needed partitions:

remove windows partition
create grub partition	ext2	200M
create Windows partition	ntfs	20G
create swap partition	swap	4G
create Linux1 partition	ext3	8G
create Linux2 partition	ext3	8G
create /home partition	jfs	40G
create share partition	ntfs	remaining size

• make sure the Windows partition has boot flag
• reboot, use rEFIT to sync MBR partition table
• reboot from windows CD, install windows
• reboot from Ubuntu CD, install Ubuntu
  • choose manual partitioning, select root and swap partition
  • don't install grub to MBR, but to grub partition (/dev/sda3, 200M)

Pending issues with Linux

• rebooting doesn't work; must hold the power button to turn it off