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Hello everyone, in this lesson we will continue to look at the Apple computer installation system

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Let's first look at how to install the system

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There are three ways to install the system on Apple computers,

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U disk installation, network recovery and disk pair copy or disk recovery

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All three methods have advantages and disadvantages

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The first is the U disk installation

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Its advantage is that it is more convenient to install and the speed is faster.

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But the disadvantage is also obvious,

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that is, the machines after 2018 cannot use the U disk to install in many cases.

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So for machines after 2018, we use more of the second method, which is network recovery

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The advantage of network recovery is that it is extremely versatile

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Whether it's the newest computer or the oldest, use Network Recovery to install the proper Mac OS

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And there is no need for a U disk, just need to be able to connect to the Internet

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Of course there are advantages and disadvantages

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The disadvantage of network recovery is that the requirements for the network are particularly high,

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and the time is relatively long, usually about an hour

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During this process, the installation may fail due to network fluctuations or Apple server problems.

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After the installation fails, you have to start all over again

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So network recovery is the longest time consuming

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The third method is disk-to-copy, or called disk recovery

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It is the fastest and most convenient installation method

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And it can also install some commonly used software

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Because it just takes a hard disk with the system installed and directly copies it

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But it also has disadvantages, and its disadvantages are the same as U disk installation

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And it will take up a U disk with a relatively large capacity, or prepare an Apple computer

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Therefore, only some places with relatively large quantities or specialized in Apple computers

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will use the method of disk copy

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Under normal circumstances, we use the most usb disk installation and network recovery

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Next we look at network recovery

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The tools to be prepared for network recovery are relatively simple.

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You only need an Apple computer with the system to be installed and a stable network environment.

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Its operation process is actually not difficult

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First enter recovery mode, that is, press Command+R

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Once in recovery mode, click Disk Utility

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It will pop up an interface like this

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We select the disk to install the system, and then click Erase to clear its data

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Then quit Disk Utility and choose to reinstall Mac OS

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Follow the prompts to complete the system installation

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Next, let's put it into practice

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First make sure the computer is turned off, press Command+R

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Then press the power button and hold Command+R until the screen turns on

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Now the screen is on

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And it's already started to enter the progress bar

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At this time, we can let go of our hands

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Wait for a while, after the progress bar is finished, it will enter the recovery mode

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Fast forward a little

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Then it will enter the recovery interface

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There are four tools in this interface

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The first is to restore from a time machine backup

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The second is to reinstall mac os

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The third is to get online help

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The fourth is Disk Utility

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We're going to use the second and fourth tool

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According to the installation process, first use Disk Utility

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After erasing the disk, use Reinstall Mac OS to install the system

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But in fact, some computers can be installed directly without wiping the disk.

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Let's try

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Click directly to reinstall Mac OS, click Continue

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It pops up a message that could not get in touch with the recovery server

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This means there is no internet connection

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Let's go online and try again

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Now connected to the network, let's try again

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Click to continue

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It will freeze

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That's because the computer needs to be online to verify something

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After the verification is complete, it will pass

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After that, it will appear an installed license terms

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Click to agree

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Next, you will enter the interface for selecting the disk.

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After selecting the disk, click Continue

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The computer will automatically start the process of installing the system

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Through observation, we can find that there is currently only one disk

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That's because the computer only has one hard drive.

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This disk has not yet been formatted

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Then we can know that this computer can also install the system without formatting the disk.

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In fact, most computers can install the system without formatting the disk.

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That is, you can install the system directly without erasing the disk.

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However, if the disk is not erased, there may be a small probability of various error reports during the installation

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So I still recommend that you erase the disk first and then install the system

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We quit the installation of Mac OS, click Disk Utility, and enter the interface of Disk Utility

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Click Display in the upper left corner, click Show All Devices

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This will show not just volumes, but devices

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We directly select the built-in hard disk of the computer, click Erase in the middle of the top

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At this time it will pop up a pop-up window, there are three options for us to choose

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We can name it casually, such as Mac

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Then the format and scheme below, don't move casually

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Format is always Mac OS Extended Journaled

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Scheme always choose GUID partition map

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After selecting these, click Erase

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it will start the process of erasing

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After the progress bar is finished, the disk will be erased

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Then we click Reinstall Mac OS above to start the real installation process

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The method of operation is the same as before

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Here we skip directly

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When the step proceeds to the disk selection interface, we select the disk

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After clicking Install, a progress bar will start

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After the progress bar is finished, the computer will automatically restart.

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Then there are one or two progress bars

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The time to enter the progress bar may last for half an hour to two hours depending on the network and environment

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Let's just fast forward here

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When the progress bar is finished, we will come to an interface like this

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It is the system settings interface

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We only need to make some settings to complete the system installation

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These settings are generally not particularly important, and you can set them according to your own preferences.

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Well, at this point our system is completely installed

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Ok, the above is the installation process of network recovery

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There is one more thing we need to pay attention to,

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that is, the Intel platform needs to use Command+R to enter the network recovery

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However, if it is Apple computers with M1 and M2 CPU,

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you need to press and hold the power button to enter the recovery mode, and then select "Options" to enter.

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Next, let's look at the second installation method, U disk installation

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The installation process of U disk installation and network recovery is basically the same,

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only the first step and the installation medium are different

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Network recovery is to install the system by downloading the installer from the network,

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and U disk installation is to use the installer written in the U disk to install the system

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Therefore, you need to prepare one more tool for U disk installation,

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that is, Apple鈥檚 installation U disk

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We only need to choose to boot from the u disk at startup

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The next process is the same as the network recovery, erase the disk, and reinstall Mac OS

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Next, let's try the U disk installation on the actual computer.

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Still the same, let's turn off this computer first

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Then plug in the boot disk

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Hold down the option key

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Then press the power button

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The option key should be pressed and held for a long time, and then released after the screen responds

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You can see that the screen now has a picture

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It entered the boot manager

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There are a total of 4 boot items in the U disk

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Three of them are different versions of the Mac OS installer

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Let's pick one at random

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After selecting the first one, you can see a forbidden symbol displayed on the screen

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This shows that the installation version of the Mac OS we selected does not match this computer

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We have to shut down and change to a new version

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Press and hold the power button for about 10 seconds to shut down

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It's still the same, we hold down the option key and then press the power button to let it enter the startup manager

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We just chose the first Mac OS installer, now we choose the second

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Now there is no forbidden symbol, but directly in the progress bar

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Indicates that this version can be installed

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Let's wait

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After the progress bar is finished, now you have entered the same interface as the recovery mode

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The next operation process is the same as the recovery mode operation process

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Use the Disk Utility grid disk, and then use the Install Mac OS to install the system

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It's just that you don't need to download the system online

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Then I will not demonstrate the next process

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Finally, let's look at the disk copy

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In addition to the Apple computer with the system to be installed,

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we also need to prepare an external hard disk or U disk with the system installed,

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or an Apple computer with the system installed

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Disk Utility is required to use DiskCopy

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Disk Utility is available in Recovery Mode, and also in System

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It is recommended to use disk utility in recovery mode

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Use the recovery function in Disk Utility to copy the system

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Next, let's try to operate this process

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First open Disk Utility

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Select Show, select Show All Devices

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This way you can see all hardware devices

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You can see that there is a system in the external U disk

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We want to restore this system from the external U disk to the internal hard disk

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First select this partition in the internal hard drive

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After selecting the partition, click the restore button on the right

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Then select the recovery source and select the system partition in the external U disk

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Then click restore

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After the progress bar is finished, the copying of the hard disk is completed.

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The system is installed

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I won't show you here

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Under normal circumstances, the two methods we use most are U disk installation and network recovery.