Mac OS X serialization-1. Startup Mode tips

MBP13 has been purchased for two weeks, and only has time to touch it on weekends. Summary of some tips

1. Security Mode
Press the power supply first, and then press the SHIFT key to enter the safe mode.

2. Start from DVD/CD
First press the power button, then put the boot CD/DVD into the suction type optical drive, and then continue to press the "C" letter button on the keyboard
Ps: C is CD.

3. Single User Mode
Since it is Unix, there must be an OK mode.
Press the power supply first, and then press the "COMMAND" Operation key + "S" letter at the same time to enter the single-user mode.
You can use basic Unix bin commands such as fsck and reboot.
Ps; Command line single user, Command single user, really easy to remember
Bytes ---------------------------------------------------------------------------------------------------
In addition, Snow Leopard hides the 64-bit running mode. SnowLeopardServer is open and Desktop
Press the "6" and "4" buttons at startup, and then press the power to start the 64bit mode. If you are 4 GB
The above DDR3-1066 memory, is recommended to use, otherwise the effect is not big.

However, not all SL instances can start the 64-Bit mode,
CPU: Intel Quad-Core Xeon and Core2Duo are both supported. CoreSolo/coteco cannot enjoy 64bit.
There are also several existing models: Macbook, Macmini, and MBA cannot start the 64-bit model either.

Check Method:
Under terminal:
$ Ioreg-l-p IODeviceTree | grep firmware-abi
Check whether the value of EFI is 32 or 64.
Either go to http://www.ahatfullofsky.comuv.com/English/Programs/SMS/SMS.html

View LCD model: $ ioreg-lw0 | grep IODisplayEDID | sed "/[^ <] * </s //" | xxd-p-r | strings-6