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From Windows back to OSX is fairly easy. What I would like is a few less steps to get from OSX to Windows. Currently I launch system preferences -> startup disk - then select the bootcamp partition and press restart.

Being completely new to OSX it seems to me that a one-click action on the dock should be possible with some sort of automation scripting. Howerver I know nothing about OSX (yet) and how that works. First, is such a thing possible, and second please provide some tutoral links for such automation system.

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What was the "fairly easy" way from windows? Just opening the bootcamp tray? –  noelicus Jan 28 at 9:36
@noelicus Yes, right click the bootcamp icon and pick Reboot in OS X. It may be interesting to know that since this original post I have moved away from bootcamp to parallels (which on a late 2013 iMac (32GB ram, 3TB fusion etc...) it's really a much better environment. Now just a two finger swipe back and forth between the two Operating systems. –  Ralph Shillington Jan 28 at 11:29
It seems there's no way of doing a "boot once to OS X". That bootcamp menu in windows seems to change the permanent start-up. On another note, I have installed parallels also. Very cool, but slower than a native boot! –  noelicus Jan 28 at 15:50

5 Answers 5

up vote 12 down vote accepted

Write a shell script that does this

# tell OSX to change the boot disk 
# nextonly just for the next time - without the default would be Windows
/usr/sbin/bless -mount /Volumes/BOOTCAMP -setBoot  --nextonly  
# reboot
/sbin/shutdown -r now

This can be called from a terminal window

sudo bootcamp

The use Automator to call this via an apple script and save as an application

on run {input, parameters}

    do shell script "/Users/mark/bin/bootcamp" with administrator privileges

    return input
end run
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Just keep in mind that when you click on this script, you wont have the chance to save any unsaved work from any application. The system WILL reboot your machine whatever the cost! –  nuc Mar 3 '11 at 21:36
Shouldn't it be --mount /Volumes/BOOTCAMP --setBoot --nextonly (notice double dashes before parameters)? –  Aldekein Nov 15 '14 at 20:41

Another way to get from OS X to Windows quickly is to use Bootchamp, which adds a menu bar item like this:

enter image description here

For my Windows-booting needs Bootchamp has worked well.

(I learned about it from a similar question on Super User I once asked.)

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BootChamp doesn't work with certain setup and it will take up additional seconds to when booting up the computer. –  aeroxy Nov 29 '14 at 17:15

Hold while booting, you'll get a prompt to choose which OS / drive you want to boot from!

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This is not what he asked, it's definitely not "quick" nor "automated" nor "one-click". –  Lohoris Mar 3 '11 at 16:54
@looris sometimes there's no need to re-invent the wheel.. –  nuc Mar 3 '11 at 21:37

I'm really fond of rEFIt.

rEFIt is a boot menu and maintenance toolkit for EFI-based machines like the Intel Macs. You can use it to boot multiple operating systems easily, including triple-boot setups with Boot Camp. It also provides an easy way to enter and explore the EFI pre-boot environment.

The OP seems to be interested about an OSX-to-Windows only command, so I guess this is not exactly what he wants. Still, I find rEFIt much easier to work with: if I want to go from one OS to another, I just need to reboot and then choose the OS I want.

And if you ever need to work with 3 (or more) OS'es, you will see rEFIT is a much better option...

It also allows you to boot up from an external hard drive or a pen drive, which is a very nice bonus.

Edit From the rEFIt page:

2013-03-29: As you may have noticed, rEFIt is no longer actively maintained. Please check out rEFInd, a fork that is maintaned and under active development.

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It seems this script from SuperUser handles the closing of open windows (and stopping the scheduled restart if user presses 'cancel'):

do shell script "hdiutil unmount /Volumes/<Windows_Partition> -quiet"
do shell script "bless -device /dev/disk0s3 -legacy -setBoot -nextonly" with administrator privileges
tell application "Finder" to restart
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