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Available only on Mac computers that have the Apple T2 Security Chip, Startup Security Utility offers three features to help secure your Mac against unauthorized access: Firmware password protection, Secure Boot, and External Boot.
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Jun 25, 2015 Downloading third-party apps safely. Unlike the iPhone and iPad, the Mac can run software that's been downloaded from any source, though OS X's default security settings will only allow you to run apps that have been downloaded from the Mac App Store and from 'identified developers'—developers who have a digital certificate from Apple on file. Warning: Antivirus software can help protect your computer against viruses and other security threats. In most cases, you shouldn't disable your antivirus software. If you have to temporarily disable it to install other software, you should re-enable it as soon as you're done.
To open Startup Security Utility:
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- Turn on your Mac, then press and hold Command (⌘)-R immediately after you see the Apple logo. Your Mac starts up from macOS Recovery.
- When you see the macOS Utilities window, choose Utilities > Startup Security Utility from the menu bar.
- When you're asked to authenticate, click Enter macOS Password, then choose an administrator account and enter its password.
Firmware password protection
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Use a firmware password to prevent anyone who doesn't have the password from starting up from a disk other than your designated startup disk. To set a firmware password, click Turn On Firmware Password, then follow the onscreen instructions. Learn more about firmware passwords.
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You can also use External Boot to prevent even those who know the firmware password from starting up from external media.
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Secure Boot
Use this feature to make sure that your Mac starts up only from a legitimate, trusted operating system. Learn more about Secure Boot.
External Boot
Use this feature to control whether your Mac can start up from an external hard drive, thumb drive, or other external media. The default and most secure setting is ”Disallow booting from external media.” When this setting is selected, your Mac can't be made to start up from any external media:
- Startup Disk preferences displays a message that your security settings do not allow this Mac to use an external startup disk.
- Startup Manager allows you to select an external startup disk, but doing so causes your Mac to restart to a message that your security settings do not allow this Mac to use an external startup disk. You'll then have the option to restart from your current startup disk or select another startup disk.
To allow your Mac to use an external startup disk:
- Open Startup Security Utility.
- Select ”Allow booting from external media.”
Your Mac doesn't support booting from network volumes, whether or not you allow booting from external media. - If you want to select an external startup disk before restarting your Mac, quit Startup Security Utility, then choose Apple menu > Startup Disk.
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When you have a firewall active on your Windows 10 laptop, you can allow certain programs to communicate through that firewall. For example, you might want to allow live apps such as Weather or Video to send information or content to your computer.
- In the Start menu click Settings, and then enter Firewall in the Find a Setting search box.
- Click Windows Firewall in the search results. In the resulting Windows Firewall window, click Allow an App or Feature through Windows Firewall.
- In the Allowed Apps window that appears, click the Change Settings button, and then select the check box for apps on your computer that you want to allow to communicate over the Internet without being stopped by Firewall.
- Click the Private and Public check box to narrow down whether you want just networks that are secure to allow this communication, or also public and nonsecure networks to do so.
- Click OK and then click the Close button to close the Windows Firewall window.
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If you allow apps to communicate across your firewall, it’s very important that you do have antivirus and antispyware software installed on your laptop, and that you run updates to them on a regular basis. These types of programs help you avoid downloading malware to your laptop that could cause advertising pop-ups, slow your laptop’s performance, damage computer files, or even track your keystrokes as you type to steal your identity and more.
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If you don’t want to pay for such a program, consider a free solution such as Spyware Terminator.