When the battery health is lower than 75%, the system will prompt the user to repair the battery.
Solution:
Method 1: Upgrade the latest system to solve the battery calibration.
1, turn on the computer and click "Launchpad" in the lower left corner.
2. Find the pop-up page and click to open the "App Store".
3. After opening, you can see the latest system in the lower right of the recommendation bar.
4. Or enter macOS in the search bar above to search for the latest system software.
5. Find and click.
6. Click the' Download' button after opening, and the mac will be automatically installed after downloading.
Method 2: Contact Apple to replace the battery after sale.
References:
Baidu encyclopedia -macbook