This is a set of links and instructions that worked out for my Samsung Galaxy Tab 8.9 (GT 7300) to upgrade to Android 4.4.4 Kitkat.
Tool: Odin 1.85
http://www.modaco.com/topic/361399-latest-odin-309-odin-185-odin-183-all-versions-samsung-rom-flashing-tools/
Step1) CWM recovery through Odin: http://forum.xda-developers.com/showpost.php?p=18598991&postcount=1
Step2) CM11 through SD CWM update: http://forum.xda-developers.com/showthread.php?t=2687229
Step3) BaNks Gapps: https://drive.google.com/folderview?id=0B1_VgIbDrK25SUJONUFNSFpGQms&
*Update 03/2015 - successful update to Lollipop
Booting into recovery tip: turn off the tablet, press and hold power + volume down button (the one closer to the power button). After icon appearing, press volume down to select the option next to Download and press volume up button to confirm.
Main source - XDA thread;
Step 1) overwrite CWM recovery with TWRP f2fs
Step 2) Get the Lollipop AOSP android:
http://mirror.lnx.im/android/galaxy-tab/ROMs/Lollipop-AOSP/
Step 3) Shutdown the tablet and boot into recovery, wipe (clear dalvik/cache) and install the AOSP ROM zip above
Step 4) Boot the device (be patient, first boot takes some time...)
Step 5) Shutdown the tablet and boot into recovery, install the gapps
.. and voilla - Lollipop is loaded. Works smooth (faster than CM11 clone). Didn't try bluetooth/3g yet though.
**Update Lollipop AOSP: Whenever tablet goes to power saving mode (ca. 5sec after the display dim), it doesn't wake-up... troubleshooting using logcat
*** Updated to Marshmallow AOSP 6.0.1 release
Avoid "error executing updater binary this package is for p5wifi" through installing p5wifi twrp recovery :
http://forum.xda-developers.com/showpost.php?p=65708385&postcount=847
