Disable Solaris GUI

It could be done by using one of the two methods.
The first one does its job immediate.

# svcadm disable cde-login

(You could also use the full FMRI, svc:/application/graphical-login/cde-login:default)

The second one takes place during the next startup.

# /usr/dt/bin/dtconfig -d

(Use -e switch to enable auto-start)

OpenSolaris on MacBook Pro

The purpose of this post is not to give the recipe for an overall installation.
I've written down a few notes about the network configuration.

I've used the Parallels virtualization and OpenSolaris b79b. Parallels emulates the Realtek 8029(AS) network card but there's no support inside the OS.
To complete this task perform the following steps:

1. Mount vmtools.iso as CD/DVD-ROM (/Library/Parallels/Tools/vmtools.iso)
2. Turn off the eeprom DMA property (atapi-cd-dma-enabled) - before the boot process edit the grub menu list (press 'e') and add the following to the kernel line:

grub edit> kernel$ /platform/i86pc/kernel/$ISADIR/unix -B atapi-cd-dma-enabled=0

Boot with a 'b' key.
3. Install the requested driver:

# cd /cdrom/prltools/Drivers/Network/RTL8029/SOLARIS
# ./network.sh
[...]
Will you receive IP address from DHCP server (Y/N)


If you've chosen the answer 'N', enter the requested values:

Enter IP address of the virtual machine:
Enter network address:
Enter network mask:
Enter default gateway IP address:


The script will modify the following files:
/etc/inet/hosts
/etc/hostname.ni0
/etc/netmasks
/etc/defaultrouter
or
/etc/dhcp.ni0
/etc/hostname.ni0
(if the 'Y' have been chosen)

Now, reboot the system.

During the boot process you could see the information:

WARNING: ni0: niattach: SA_eeprom is funny, assuming byte-mode

but everything should be just fine.