Disk Assistant

Note: If your system has only one partition and you need to recover the lost files on the system disk, you must prepare a writable removable disk. The file system is: exFAT, fat32, hfs, One of hfsp or apfs is sufficient. The remaining space of the removable disk must be larger than the system disk, and the name is changed to "temp". Download Disk Assistant to the root directory of the removable disk and unzip it.

1. Download Disk Assistant to the partition where no data is lost. It is a compressed package and there are three files after decompression.
For versions after MacOS10.13, to restore the lost files on the system disk, please click detailed steps


2. Versions before MacOS10.13 can run Disk Assistant directly.
For versions after MacOS10.13, please start the terminal (Applications ➤ Utilities ➤ Terminal), drag the "run.sh" file to the terminal, and press Enter.


3. Now you have two ways to recover lost data:
a. To start the data recovery product downloaded from the application store, it is necessary to keep the disk assistant and data recovery running at the same time. For other steps, please refer to the data recovery help document.


b. Use Disk Assistant to recover directly. Please ask us for the serial number first, which is needed during the recovery process.
◆Select the partition where the data is lost, select full scan, and click scan.


◆Wait for the scan to finish, select the file or directory and click "Recover".






Please ask us for the serial number first, it will be needed during the recovery process,
1. Prepare a writable removable disk, the file system is: exFAT, fat32, hfs, hfsp, apfs, the remaining space of the removable disk should be greater than the system disk, the name is changed to "temp", copy the disk assistant Three files to the root directory of the removable disk.


2. MacOS enters recovery mode: In the shutdown state, long press Command+R, then press the power button to start the computer, until the progress bar appears, then release the Commang+R key, successfully enter the recovery mode as shown below:


3. Start the terminal command line tool, as shown below:


4. Enter the directory where Disk Assistant is located and start Disk Assistant, please refer to the following commands:
Command "cd": lowercase letters, shorthand for "change directory", meaning to enter the specified directory.
Command "ls": lowercase letters, shorthand for "list", display all files and directories in the current directory.
All commands and parameters are case sensitive, if an error is prompted, just re-enter it.

Commands and parameters	Instructions
cd /Volumes/temp	Enter "cd", enter a space, enter "/Volumes/temp", press Enter, "temp" is the name of the removable disk.
ls	Enter "ls" and press Enter. If you can see "DiskAssistant.app" and "run.sh", please continue to the next step, otherwise, please check for errors.
./run.sh	Enter "./run.sh" and press Enter

Successfully start the disk assistant as shown below:


4. After successfully starting the Disk Assistant, click "Data Recovery":
◆Select the partition where the data is lost, select full scan, and click scan.


◆Wait for the scan to finish, select the file or directory and click "Recover".