How does CleanMyMac clean up the Mac system?
When most people clean up iTunes trash through the application and clean up attachment files, but it does not really clean iTunes trash. iTunes is not only music but also iso data, etc., so people can't clean it up manually, so cleanmymac can help people solve problems.
Language files
There are many different language packs in the Mac system and applications. Generally, people do not need to install different languages for each application, so cleanmymac can help you clean up redundant language file packs.
Cache files
Cache is a buffer for data exchange, which is convenient for people to load web pages more. Excessive file cache will reduce the performance of your Mac, so it is necessary to clean the cache regularly.
Log files
Log files usually record people's daily activities, services, or processes. But when the log is lost, it will affect the loading speed of the Mac, so you need to customize and clean your log file to improve the performance of the application, while saving Mac space.
Binary file
is an application package of a set of files. These files allow applications to run on two different types of mac architectures, such as Intel and PowerPc, but generally macs use only one architecture, so other architectures The application is not needed.
Broken files
Broken files refer to some damaged files in the mac or sudden power failure or hard disk damage. Then these broken files in the mac will affect the running speed of the mac, so it is best to delete them.
ISO image cache
ISO image cache is called ipod image cache. When people create folders synchronously, they will generate corresponding cache files. Once they accumulate, it will also have a certain impact on the running speed of Mac.
Speaking of Mac computers, the operating system is very easy to use, the iPhone and iPad are very convenient to connect, and the design editing is very fragrant, but it can't stand its expensive. It's expensive, the hard drive is still small. If you want a bigger hard drive, please pay more than 1,500 yuan, thank you.
But as the time of use becomes longer, the hard disk space gradually becomes smaller, and the storage space is quickly stretched. What to do then? Deal with junk files. Friends who are used to macOS will know that it does not retain a large number of cache files when it runs daily, but the number of accumulated files is not small, especially the software cache files, which occupy a lot of space. The following will teach you a few simple steps to clean up junk files on Mac computers. 
Some people may not know that macOS comes with a great file management function. Click on the Apple icon at the top left of the screen and select "About This Machine"-"Storage Space" to view the file storage status of your computer's hard drive, which is a document Which account is larger or APP accounted for larger. 
Click "Manage" to enter the file management interface. It will automatically analyze the file storage status on your computer's hard drive, and divide it into categories such as books, manuscripts, music, applications, and photos. 
Among them, manuscripts are various files on the computer. After clicking, there are four display options. Because manuscript files are more important and may be deleted accidentally, it is recommended that you choose the "File Browser" to view the files. The files are arranged from largest to smallest, and the file name and file location are clear, and we can clean up at will.
The next step is the applications, which are also arranged in descending order of occupied space. Unused software can be deleted directly by right-clicking, because the application uninstallation of macOS is not like the Windows system, and you have to wait for the uninstaller to uninstall.
After cleaning up the documents and programs, there is still a part of the space that can be cleaned up, that is, the cache left over when the software is running. Because we don't know which cache files are useful, once you delete the error manually, you have to reinstall it. So it is best to choose a cleaning tool to clean up. It is recommended that you use CleanMyMac, an old Mac computer cleaning tool. Its operation method is also very simple. Use the smart scan function to scan the junk files in the computer, and then click to run. It is more convenient and suitable for lazy people with one-click operation.
It also has a large and old file screening function, which is different from the file management function that comes with macOS. It is sorted by a single file. When searching, the cache files in the app can be searched out, but everyone is deleting Be careful when you do so, it is best to right-click and select the open file location to check it, so as not to delete mistakes.
Finally, I will give you a small tip. When using macOS, daily files can be placed on the desktop, and important files can be placed in the manuscript. This will help you distinguish.
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Version update query:
https://blog.csdn.net/CaiHuaZeiPoJie/article/details/106012362