Unlike earlier models, where every USB port could provide 500 mA of power, only a single high-powered device can be attached to the USB ports, and software will enable one of its downstream ports to supply 500 mA of power. Mid 2007 models shipped with OS X 10.4.9 Tiger and will support OS X 10.9 Mavericks when it ships. It has 3 USB 2.0 ports, one more than the 15″ MBP offers. ![]() This model includes built-in dual-DVI support for Apple’s 30″ Cinema Display and an ExpressCard/34 slot (replacing the older PC Card). Note that the built-in display is only capable of 18-bit color, not the full 24-bit color you might expect. And they run their CPUs a tiny bit faster. 2 GB of RAM is standard, with a 6 GB ceiling (up from 3 GB). The included Nvidia GeForce 8600M GT graphics, an improvement over the ATI Mobility Radeon X1600. ![]() The Mid 2007 MacBook Pro models use Intel’s new Santa Rosa chipset with the Merom CPU on an 800 MHz system bus (which can be dynamically adjusted to save power), up from 667 MHz on last year’s model. If 1680 x 1050 isn’t enough for you, you can upgrade to a 1920 x 1200 screen for just US$100 more. The June 2007 17″ MacBook Pro is the first Apple notebook to offer an even higher resolution 17″ display.
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