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Hello everyone, in this lesson we will take a look at the installation of Mac OS

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The precautions for installing the Mac OS are the same as those for installing the Windows system,

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so I won't repeat them here.

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To learn the installation of the Mac OS, let's first look at some shortcut keys commonly used by Apple computers

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Let's take a look at the keyboard of the Apple computer,

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and we can see that it is not the same as the keyboard of an ordinary Windows computer.

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It has two more buttons, one is option and the other is command

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These two keys are unique to Apple computers.

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The shortcut keys of the Apple part are completed through these two keys plus different key combinations

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These shortcut keys need to be pressed and held when the Apple computer is turned on

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If there are multiple buttons, you need to press all the buttons at the same time.

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Next, let's take a look at these buttons

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First is command+R

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It is the shortcut key to enter recovery mode

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Mac recovery mode is a very powerful mode

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In the recovery mode, you can complete the installation of the Mac OS

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without any external tools and only need to be connected to the Internet

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It can be said that this shortcut key is the shortcut key we use the most

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Next is option

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Option is to enter Apple's startup manager

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It is used to adjust the startup items

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If we want to make the Apple computer boot from the U disk,

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we need to press and hold option when the computer is turned on.

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After entering the boot manager, adjust the boot from the U disk

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The above two shortcut keys are commonly used shortcut keys when installing the system

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The following two shortcut keys are used more frequently when repairing the computer

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Let's take a look

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Option+Command+P+R

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This shortcut key needs to be pressed and held, and then let go after the computer beeps three times

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The function of this shortcut key is similar to that of an ordinary computer to clear the BIOS.

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When there is a problem with the computer, we can shut it down,

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press and hold these four buttons to try to solve the problem

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It is possible to clear the BIOS and the fault will disappear

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Next, let's look at the last shortcut key, the D key

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The function of this key is to enter the Apple diagnostic tool

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The Apple diagnostic tool is Apple's own,

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which can perform the most basic detection of the hardware

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We should note that the above shortcut keys are all used on the Intel platform

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If it is an Apple platform such as M1 and M2, these shortcut keys cannot be used

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If you don't have an Apple keyboard, you can also use a normal keyboard instead of an Apple keyboard

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Just use the win key instead of the command key, Alt instead of the option key

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Finally, let's try these shortcut keys on the actual computer

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First of all, command+R

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This is entering recovery mode

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We need to make sure that the Apple computer is turned off

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Press and hold command+R first, then press the power button

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After pressing the power button, do not let go of command+R

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Keep pressing until the screen appears

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When the Apple logo or the earth appears on the screen, and there is a progress bar below,

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it starts to progress

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Then we release the button

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When the progress bar is finished, it enters the recovery mode

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This progress bar generally moves slowly, so let's fast forward a little bit

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You can see that it is now in recovery mode

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In this state, the installation of the Mac OS can be completed.

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Next, let's try the second shortcut key

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turn off the computer first

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The second shortcut key is option to enter the startup manager

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It's still the same, we first hold down the option in the off state, and then press the power button

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Option must be long pressed, and then released after the screen has a picture

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As you can see, you have now entered the startup manager

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We can let go of the option key

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At present, there is only one startup disk of the computer's built-in disk in the startup manager

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Next, we plug in the Apple boot U disk and wait for a while.

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As you can see, there are now 4 more boot partitions

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They are the boot partitions in the USB drive

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Next, let's try the third shortcut key, clear BIOS

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Shut down first, press and hold the power button for about 10 seconds to shut down

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After shutdown, hold down option, command, P, R

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Then press the power button

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The first sound has already sounded, let's continue to press and hold

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The second beep, keep pressing

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The third tone

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OK, you can let go of the button

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Let go of the button, wait a moment

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The screen is already on

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Then it will walk a progress bar, and then enter the system

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At this time, the operation of clearing the BIOS is over.

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Next, let's shut down and try the last shortcut key

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Hold down the D key, then press the power button

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Don't let go of the D key until the screen lights up

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Now the screen appears to select the language interface

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We choose the language we need

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Next, it automatically detects

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After the test is complete, a result table will appear

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Here we will not continue to detect, just shut down

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Well, the above are the common shortcut keys for Apple computers

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Finally, I would like to emphasize that

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the four shortcut keys listed here can only be used after shutting down the computer and then turning it on.

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If you have already entered the system, press these shortcut keys again,

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it may not be the function you want