Many US Apple Stores are now marking some MacBook Pro models as "unavailable" for reservation, accounts say. The most commonly inaccessible model is the 2.53GHz 15-inch Pro, even if its 17-inch equivalent may also sometimes be unavailable. 2.66GHz 13-inch systems are similarly being kept off of reservation lists, although this said to be less common than with the affected 15- and 17-inch notebooks.