You can get the Service Menu and check the bootload status by issuing the following from the command line (assuming you have adb in your path, tablets got usb debugging enabled, and its connect to the pc, etc, etc, etc):-
adb shell "am start -a...
Stock Firmware 10.1.1.A.1.253 FTF for XPERIA Tablet Z Model SGP321 16GB LTE
SGP321_10.1.1.A.1.253_Unbranded.ftf.zip.001 - 480.00 MB
SGP321_10.1.1.A.1.253_Unbranded.ftf.zip.002 - 268.49 MB
Generated using Sony EMMA & Androxyde's flas...
For some reason thats beyond me, on OS X you have to install the Android File Transfer - www.android.com/filetransfer/
On my iMac it works fine, but on my Air it doesn't do anything.
The Transformers movie isn't on the device, it's streamed ...
I think you can root the tablet if you unlock the bootloader. If you want root currently on the 253 version, you can unlock the bootloader and install cwm recovery. I have not done so, maybe someone else can confirm.
Sent from my SGP321 using ...
I am getting this error
Enter option: 2
Warning: The Command Line Tools for Xcode don't appear to be installed; most ports will likely fail to build.
Warning: See http://guide.macports.org/chunked/installing.xcode.html for more inform...