Now computers are very powerful, but they are also very fragile. They often need you to maintain them. They often need you to reinstall the system. How do you reinstall the system in Mac OS? Users who have just used a Mac computer are expected to have a headache? In fact, if you look at this article carefully, you can reinstall your new computer by yourself. The first step: 1. First, when the MacBook Air is closed, press the Command and R buttons and let go, then press the top right button at the same time (note that you continue to press Command + R at this time). ). Step 2: After entering the interface, you can release all the buttons. There are 4 options: Restore From Time Machine Backup is the image from your past backup to Time Machine. Reinstall Mac OS X. As the name suggests, reinstall Mac OS X Lion, Get Help Online is to retrieve the help file from the online Learn about reloading steps and common problems, and the last Disk Utility is for managing hard drives, including: splitting the magnetic area, formatting the disk area, and so on. Step 3: In the upper right corner of the screen, you can connect to Wi-Fi. It is recommended that you connect to ensure that the download and installation process goes smoothly. Step 4: Click “Get Help Online” to see all the information and steps of the reply system. Step 5: The most interesting thing is that it is actually a full version of Safari, everyone can browse the web here! Step 6: If you click Restore From Time Machine Backup, you can enter this interface. Remember to connect the external hard drive used as a Time Machine backup to your MacBook Air at this time, then click "Continue". Step 7: If you have connected the hard drive, you should be able to see the past backup file on this page. Just click "Continue" and you can restore your MacBook Air to the backup. Since Time Machine is not used, this feature will not be described here. Step 8: Some friends may want to split the MacBook Air's SSD solid state drive into two or even several disk areas. In fact, you can click Disk Utility before reinstalling Mac OS X Lion. You can see this screen after entering, then click the disk you want to split. Step 9: Click on “Partitions” and pull the position in the lower right corner of the white part on the left side below to adjust the part that uses Macintosh HD. After finishing, click on the unset part on the right side, and then create a new magnetic area. Of course, after installing Mac OS X Lion, you can always do this in "Disk Utility" in "Utilities". Step 10: Click “Reinstall Mac OS X”, and then it will pop up with Apple's server before installation. Remember to connect to the Internet, then click “Continue” to continue. Step 11: Then everyone will see an Agreement, click on "Agree" and then click on "Agree" above. Step 12: Choose which volume you want to install Mac OS X Lion to. Step 13: Start reloading, wait! This download step takes about 1 hour (in the case of Wi-Fi connection). Step 14: At this point, most of the time, the system will start again, and the familiar Apple logo will come out again. Step 15: Start installing Mac OS X (this step takes about 30 minutes). Step 16: After the completion, the system will restart again, then after about 10 seconds, it will officially enter Mac OS X Lion, and the reinstallation is completed! (The system will automatically pop up the Wi-Fi connection prompt, very considerate!) Step 17: The installation is complete. Website reminder: Please be sure to back up important data before reinstalling the system, and develop a good habit of regular backup, otherwise you will regret if you have problems. This article comes from [website] www.xxx Now the computer is very powerful, but it is also very fragile, often need you to maintain, and often even need you to reinstall the system, then how does Mac OS reinstall the system? Users who have just used a Mac computer are expected to have a headache? In fact, if you look at this article carefully, you can reinstall your new computer by yourself. The first step: 1. First, when the MacBook Air is closed, press the Command and R buttons and let go, then press the top right button at the same time (note that you continue to press Command + R at this time). ). Step 2: After entering the interface, you can release all the buttons. There are 4 options: Restore From Time Machine Backup is the image from your past backup to Time Machine. Reinstall Mac OS X. As the name suggests, reinstall Mac OS X Lion, Get Help Online is to retrieve the help file from the online Learn about reloading steps and common problems, and the last Disk Utility is for managing hard drives, including: splitting the magnetic area, formatting the disk area, and so on. Step 3: In the upper right corner of the screen, you can connect to Wi-Fi. It is recommended that you connect to ensure that the download and installation process goes smoothly. Step 4: Click “Get Help Online” to see all the information and steps of the reply system. Step 5: The most interesting thing is that it is actually a full version of Safari, everyone can browse the web here! Step 6: If you click Restore From Time Machine Backup, you can enter this interface. Remember to connect the external hard drive used as a Time Machine backup to your MacBook Air at this time, then click "Continue". Step 7: If you have connected the hard drive, you should be able to see the past backup file on this page. Just click "Continue" and you can restore your MacBook Air to the backup. Since Time Machine is not used, this feature will not be described here. Step 8: Some friends may want to split the MacBook Air's SSD solid state drive into two or even several disk areas. In fact, you can click Disk Utility before reinstalling Mac OS X Lion. You can see this screen after entering, then click the disk you want to split. Step 9: Click on “Partitions” and pull the position in the lower right corner of the white part on the left side below to adjust the part that uses Macintosh HD. After finishing, click on the unset part on the right side, and then create a new magnetic area. Of course, after installing Mac OS X Lion, you can always do this in "Disk Utility" in "Utilities". Step 10: Click “Reinstall Mac OS X”, and then it will pop up with Apple's server before installation. Remember to connect to the Internet, then click “Continue” to continue. Step 11: Then everyone will see an Agreement, click on "Agree" and then click on "Agree" above. Step 12: Choose which volume you want to install Mac OS X Lion to. Step 13: Start reloading, wait! This download step takes about 1 hour (in the case of Wi-Fi connection). Step 14: At this point, most of the time, the system will start again, and the familiar Apple logo will come out again. Step 15: Start installing Mac OS X (this step takes about 30 minutes). Step 16: After the completion, the system will restart again, then after about 10 seconds, it will officially enter Mac OS X Lion, and the reinstallation is completed! (The system will automatically pop up the Wi-Fi connection prompt, very considerate!) Step 17: The installation is complete. Website reminder: Please be sure to back up important data before reinstalling the system, and develop a good habit of regular backup, otherwise you will regret if you have problems. This article comes from [website] www.xxx