Currently Being ModeratedOct 24, 2013 4:10 PM (in response to omerasher)
same problem here..
i can update using the "purchases" and view the list. if updates are available, the button on the right side shows "update" - click it and the apps will be updated.
system updates, like iTunes, can´t be done this way.
until apple solves this problem, you can do updates using the terminal and enter:
sudo softwareupdate -i -a
to install all available system updates.
to see which updates are available type
sudo softwareupdate -l