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About your computer’s firmware
The term firmware refers to computer chips that have data or programs recorded on them. When your computer is manufactured, its firmware is specifically programmed to tell your computer how to perform tasks. However, the type of firmware installed in your computer can be updated later if your computer requires a change.
Firmware updates are usually included in macOS updates, which are provided through the App Store. To check for updates, open App Store and click the Updates button. For more information, see Update macOS and apps.
Note: Firmware shouldn’t be confused with malware, which can be harmful to your computer.