unable to purchase from App Store - Unknown error (100) I signed out and restarted but no luck. No problem getting a free app only getting the error when trying to buy final cut
Mac Pro, iOS 5.1.1
Installing the appropriate combo update may help.
For Snow Leopard v10.6 > About the Mac OS X v10.6.8 Update
For Lion v10.7 > OS X Lion Update 10.7.4 (Client Combo)
Then restart your Mac and trry purchasing FCut.
If you have anti virus softrware installed, disable that before purchasing.
Try turning off the Firewall in System Preferences > Security & Privacy > Firewall
And try resetting your Apple ID password > Apple - My Apple ID
unable to purchase from App Store - Unknown error (100)
