Comment supprimer un logiciel malveillant ou un virus sur Mac

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Malware and viruses can be detrimental to your Mac’s performance and security. This guide will help you understand how to effectively remove any existing threats and provide tips to protect your system from future infections.

Identifier le problème

Signs of Malware Infection
  1. Lenteur des performances: Your Mac is running slower than usual.
  2. Pop-up Ads: Unwanted advertisements appear frequently.
  3. Comportement inhabituel: Programs open or close without your command.

Checking for Malware
  1. Moniteur d'activité: Open Activity Monitor to check for suspicious processes.
  2. Disk Utility: Use Disk Utility to verify disk health and spot anomalies.
  3. Préférences du système: Check for unfamiliar extensions or login items.

Removing Malware

Utilisation des outils intégrés
  1. Mode sans échec:
    • Restart your Mac and hold the Shift key.
    • This mode disables unnecessary startup items and can help identify the problem.
  2. Moniteur d'activité:
    • Open Activity Monitor from Applications > Utilities.
    • Identify and quit suspicious processes.

Third-Party Software
  1. Malwarebytes for Mac:
    • Download and install Malwarebytes.
    • Run a scan and follow prompts to remove detected malware.
  2. CleanMyMac X:
    • Install CleanMyMac X.
    • Use the Malware Removal tool to scan and eliminate threats.

Suppression manuelle
  1. Delete Suspicious Applications:
    • Open Finder and go to Applications.
    • Drag any suspicious apps to the Trash and empty it.
  2. Supprimer les extensions de navigateur:
    • Open your browser and look into installed extensions.
    • Remove any that seem unfamiliar or unnecessary.
  3. Check Login Items:
    • Go to System Preferences > Users & Groups > Login Items.
    • Remove any items you do not recognize.

Prévenir les infections futures

Keeping Software Updated
  1. macOS Updates:
    • Regularly update your macOS for the latest security patches.
    • Go to System Preferences > Software Update.
  2. Application Updates:
    • Ensure all installed applications are up-to-date to avoid vulnerabilities.

Utilisation d'un logiciel antivirus
  1. Reliable Antivirus Programs:
    • Consider using reliable antivirus software such as Norton or Bitdefender.
    • Schedule regular scans and keep the software updated.

Pratiques de navigation sûres
  1. Éviter les liens suspects:
    • Ne cliquez pas sur des liens provenant de sources inconnues.
    • Be cautious with email attachments from unfamiliar senders.
  2. Sites web sécurisés:
    • Only enter personal information on websites with HTTPS encryption.

Enabling Security Features
  1. Firewall:
    • Ensure the Mac firewall is enabled.
    • Go to System Preferences > Security & Privacy > Firewall.
  2. Gatekeeper:
    • Use Gatekeeper to allow only trusted apps from the App Store or identified developers.
    • Go to System Preferences > Security & Privacy > General.
  3. Authentification à deux facteurs:
    • Activez l'authentification à deux facteurs pour votre identifiant Apple.
    • This adds an extra layer of security to your account.

Sauvegardes régulières
  1. Time Machine:
    • Use Time Machine to back up your data regularly.
    • Connect an external drive and set up backups in System Preferences > Time Machine.
  2. Cloud Services:
    • Consider using cloud storage services like iCloud or Dropbox for additional backup options.

By following these steps, you can effectively remove malware from your Mac and enhance your system’s security to prevent future infections.