I was finally able to use a decent Internet connection (PLDT DSL) and was able to download my long-desired XCode 4.6.3. It was only available on the Mac App Store but my regular Internet connection wouldn’t let me download anything significantly big.
After the upgrade, I ended up with two versions installed. It turned out that the old version (3.x.x) was still there in the /Developer folder. But I’m not planning on using it anymore. Apple themselves have recommend deleting it since Xcode 4.3. The safest way is detailed by OSXDaily but the quick way is outlined below
Open terminal
sudo /Developer/Library/uninstall-devtools –mode=all
rm -rf /Developer
That’s it.
Note: I did as outlined above and I encountered no problem. However, I take no responsibility for any problems you encounter :P