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.
![Boot Boot](/uploads/1/2/6/5/126591424/602761576.png)
Only as secure as you make it. It's built on a solid & robust BSD base, with much sand boxing and in 10.6 even malware detection is built in. None the less, even with all the secure foundations and advance heuristics, nothing is fail proof. Jan 02, 2018 Once the Mac is rebooted, the signature on the boot.efi specified in NVRAM on the PreBoot partition is verified. If this check fails, the iMac Pro should boot into the macOS Recovery (though in my testing, it continually rebooted until I held down the option key and manually booted to the macOS. However, that doesn’t stop somebody using a USB memory stick to boot the Mac and potentially wipe all the data from the hard disk, or simply reinstall OS X/macOS. The solution is to apply a. Jul 03, 2017 This control panel will inform you how you can connect. If you have another Mac on the local network, you can open a Finder window, look in the Shared section of the sidebar, select the computer you want to control, and click Share Screen. If you don’t have a Mac or want to use another VNC client, you can connect to the IP address displayed here.
To open Startup Security Utility:
- 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
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.
You can also use External Boot to prevent even those who know the firmware password from starting up from external media.
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:
Secure Boot Control For Mac Macos Free
- 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.