I am at a disadvantage when rooting from a Mac, but my first question is, "On reboot, is the lock open or closed, after rooting?" Barry is correct, unlocking the bootloader will wipe your tablet. The only time that you should lose root is after an OTA update, but that will not relock the bootloader. My guide in our forum is for Windows based toolkits, so if your toolkit is not actually unlocking the bootloader, you may want to look at some of the other options in your link to unlock the bootloader or try to root on a friend's Windows based pc. Keep us posted.
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