1. Go to System Settings
Go to General, then Software Update, check that the Mac OS is up to date.
2. Go to System Settings
Go to General, then Time Machine, check that the most recent backup on all drives is within the last 24 hours.
3. Checking for Updates on other apps.
Word, Excel etc. In Word, click on Help, Check for Updates
Thunderbird. In Thunderbird, click on Thunderbird, then About Thunderbird, it will then check for updates.
Skype. In Skype, click on Skype, then Check for Updates.
4. Go to System Settings
Go to Passwords, Log in with your machine password, check security recommendations for compromised, reused, weak, leaked passwords.
