It took me a year to figure this out and only with the help of this site and the people here have I been able to do it.
Here are the simple steps to get your mybook World Edition II working with a Macintosh.
1. After initially setting up your MBWE in Windows using WD anywhere or Mionet go to manage and you will enter the web interface for managing the shares on your MBWE. You can also enter this web interface from either a mac or win by typing in the MBWE's ip/auth entering the user and password… After you have initially setup the MBWE in windows you can do all of this from a MAC.
2. Go to File Sharing http://<ipOfYourMB>/auth/fileshare.pl and after you have created your folders you must create a user. Under sharing/User management, Create a Username (all one word) and password and set that user's permissions to full. Once you create the User you will see the User name IMPORTANT: unix/linix is case sensitive, some MBWEs automatically assign a user in all caps, some don't so take not if you user is in all caps you will need to enter it in all caps in the next few steps.
3. Set a static IP on your MBWE by going to the web interface and Configure the network settings http://<IP-of-your-MBWE>/auth/updnetwork.pl . You must switch to manual, click next, assign an ip in the range of your LAN and a gateway. An easy way to do this is just look to the right and copy the same ip settings and gateway that the drive was assigned under DHCP. Now you must provide a DNS, you can find this in your router settings. WRITE ALL OF THIS DOWN somewhere.
4. Now you need to install the hinner script that enables SSH by going to the first steps area of this website. http://mybookworld.wikidot.com/first-steps-with-mbwe . Copy the firmware update code into your browser but with the correct IP address. Click update firmware once you see it will let you. It will take a couple mins but not long. It may say firmware update failed site busy or something but chances are that SSH is now enabled. An easy way to check is to open up terminal in utilities and type ssh BM.ruoy.fo.sserdda.pi|2petSnIdetaerCuoYemaNresu#BM.ruoy.fo.sserdda.pi|2petSnIdetaerCuoYemaNresu and then hit return. If it asks for a pw then you are in business. Type the password you assigned to that user and enter, then type su - enter and you should see root@MyBookWorld or whatever you named your MBWE, This makes you a super user and allows you access to change permissions.
5. Make the MH script permanent. This is a tricky part so if you don't feel comfortable with it, don't mess with it cause it can brick your MBWE. As long as you don't turn your MBWE off during this process you could just do this at the end of step 10 using a proper text editor in Cyberduck so if you don't feel comfortable with vi then don't attempt using it. If you do then type vi /etc/inittab then return. A Unix text editor will come up and open the file inittab. For more info on how to use it google unix vi. Basically i will enter insert mode where you will line down to the last line of the startup inits and type in the line that is under the directions for the Hinner script to make it permanent. once you type it in correctly hit the esc key and then type ZZ (capZ twice fast), this will save the file.
6. All your shares are located in /shares/internal/ to get there you type cd /shares/internal/ and return. Look up permissions ssh on this site to determine what if any special permissions you would like to set while in unix using chmod for read write and chown for ownership. The best way to do this is to just do it in Cyberduck after you have enabled root access which is the next step. Cyberduck doesn't support chown so you must set your chown permissions in unix or WinSCP.
7. Setting a pw for root user. Type cd .. and this should bring you back to the root directory of your MBWE. type passwd root (in lowercase letters) and return. You must use a password with upper and lower case letters and a number over 6 chars long or it will say password too weak. a good example is LuCk77, confirm the pw. type exit, return, then type exit again, return, then type it one more time and quit terminal. That should be the end of your unix dealings for a while unless you wish to install optware, etc..
8. DL Cyberduck for macintosh and make sure it is up to date. Cyberduck is a free Sftp (ssh) and ftp server. Very nice.
9. Once you have cyberduck installed launch it and click on open connection. A popup will open. Under protocol select SFTP (SSH Secure File Transfer), for Server type the ip of your MBWE, under username type root pass:LuCk77 or whatever you decided for a pw in step7. click Add to keychain and click connect. You will end up in the root directory so you will want to navigate one level up and you will now have full access to your MBWE including setting permissions. Now bookmark this and you will be able to get here with one click once you start Cyberduck. You should store your shares in /shares/internal/ and set up new shares using the web interface so they can automatically be granted the correct user permisions unless you know exactly what permissions to assign. Cyberduck doesn't allow you to set ownership like chown or winscp so you should set up your share folders using the web interface which you can do easily from a mac.
10. Set your permissions the way you need for everyone and you should be set.
That's it. It's really quite simple once you have the Martin Hinner script that enables SSH and you have edited the inittab file.
Hope this helps,