Remove malware from MacBook Air

Download and run the Malwarebytes utility application.  The app was designed solely to seek out adware and known malware and remove it. It’s a popular tool among veteran users here in the Community. Run the app and see if it can identify any malware you may have accidentally installed. The free version is probably all you need at this point to identify and quarantine potential problems.

What makes you think you have malware installed on your computer?

What symptoms are you experiencing?

For more info, please see these support documents:

• Effective Defenses Against Malware - Apple Community

• Avoid phishing emails, fake 'virus' alerts…and other scams - Apple Support