![]() ![]() ![]() ![]() Only Macintel models can boot from GPT hard drives. Intel-based Macs use a partitioning scheme known as GPT. The MacBook is designed to run safely in closed lid mode, but if yours runs hot (perhaps due to overclocking or high ambient temperatures), you may want to open the lid when in closed lid mode: The screen will remain off and the computer will more readily vent heat from the CPU. Since all video RAM is now dedicated to the external monitor, you may have more colors available at higher resolutions. The built-in display will remain off, and the external monitor will become your only display. Your ‘Book will go to sleep, but you can wake it by moving the mouse or using the keyboard. Power up your ‘Book until the desktop appears on the external display and then close the lid. To used closed lid mode, your ‘Book must be plugged into the AC adapter and connected to an external display and a USB or Bluetooth mouse and keyboard (you might also want to consider external speakers). Closed Lid Mode: All Intel ‘Books support “lid closed” (or clamshell) mode, which leaves the built-in display off and dedicates all video RAM to an external display. ![]()
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