If you’re using a Mac desktop without a T2 chip (such as an iMac), switch it off, unplug the power cord and wait 15 seconds, plug it back in, then turn on your Mac. If your Mac has a T2 chip.
“If you erased your Mac with Apple M1 chip before updating to macOS Big Sur 11.0.1, you might be unable to reinstall macOS from macOS Recovery,” Apple explains in a new support document. To disable it, open the System Preferences app and go to the Mission Control preference. There are four options here that you can enable or disable. For our purpose, you need to disable/uncheck the ‘Automatically rearrange Spaces based on most recent use’ option. Once you do, desktop spaces will stop rearranging themselves. If you haven’t already, you should update your Mac right now. A recently patched zero-day vulnerability in macOS operating systems has been allowing hackers to bypass much of Apple’s security.
If you're using a Mac with 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.
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're asked to select a user you know the password for, select the user, click Next, then enter their administrator password.
- 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.
Set a firmware password
You can 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 in Startup Security Utility, click Turn On Firmware Password, then follow the onscreen instructions. Learn more about firmware passwords.
You can also change your external boot setting to prevent even those who know the firmware password from starting up from external media.
Change Secure Boot settings
Use these settings to make sure that your Mac always starts up from a legitimate, trusted operating system.
Full Security
Full Security is the default setting, offering the highest level of security. This is a level of security previously available only on iOS devices.
During startup, your Mac verifies the integrity of the operating system (OS) on your startup disk to make sure that it's legitimate. If the OS is unknown or can't be verified as legitimate, your Mac connects to Apple to download the updated integrity information it needs to verify the OS. This information is unique to your Mac, and it ensures that your Mac starts up from an OS that is trusted by Apple.
If FileVault is enabled while your Mac is attempting to download updated integrity information, you're asked to enter a password to unlock the disk. Enter your administrator password, then click Unlock to complete the download.
To Avoid Mac Os Sierra
If the OS doesn't pass verification:
![Avoid Avoid](https://images.macrumors.com/t/18jNpGCGZRKhXOvNpF2Ru5X-fLs=/400x0/filters:quality(90)/article-new/2020/05/catalina_software_update.jpg?lossy)
- macOS: An alert informs you that a software update is required to use this startup disk. Click Update to open the macOS installer, which you can use to reinstall macOS on the startup disk. Or click Startup Disk and choose a different startup disk, which your Mac will also attempt to verify.
- Windows: An alert informs you that you need to install windows with Boot Camp Assistant.
If your Mac can't connect to the Internet, it displays an alert that an Internet connection is required.
- Check your Internet connection, such as by choosing an active network from Wi-Fi status menu in the menu bar. Then click Try Again.
- Or click Startup Disk and choose a different startup disk.
- Or use Startup Security Utility to lower the security level
Medium Security
During startup when Medium Security is turned on, your Mac verifies the OS on your startup disk only by making sure that it has been properly signed by Apple (macOS) or Microsoft (Windows). This doesn't require an Internet connection or updated integrity information from Apple, so it doesn't prevent your Mac from using an OS that is no longer trusted by Apple.
If the OS doesn't pass verification:
- macOS: An alert informs you that a software update is required to use this startup disk. Click Update to open the macOS installer, which you can use to reinstall macOS on the startup disk. This requires an Internet connection. Or click Startup Disk and choose a different startup disk, which your Mac will also attempt to verify.
- Windows: An alert informs you that you need to install windows with Boot Camp Assistant.
No Security
No Security doesn't enforce any of the above security requirements for your startup disk.
Change External Boot settings
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. Attempting to do so will cause your Mac to display a message that your security settings do not allow this Mac to use an external 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.
I have a MacBook Pro and every time I leave the computer running for a long period of time, the computer puts itself to sleep and asks a password to wake it up.
Undoubtedly such a password protects my MacBook with the easiest way, and this option is set by default while my MacBook is login with a user password. But it seems troublesome sometimes. And probably it would lock me out of Mac while I suddenly forget Mac password.
![Avoid Avoid](https://www.macworld.co.uk/cmsdata/features/3681778/security_updates_only.png)
So I try to stop OS X from asking for password after waking up from sleep. If you need to do this, you had better make sure your Mac is running in your home network and nobody could use your Mac without permission except you. Otherwise, your Mac will face a security problem.
Let's see how to disable password requirement when waking up Mac from sleep.
Step 1: Click the Apple Menu on your Mac and choose System Preferences.
Step 2: Find and click the option Security & Privacy in System Preferences.
Step 3: Click the lock at the left-bottom side to remove with administrator password.
Before changing settings on System Preferences, it is necessary to state you have administrative privileges. So usually the 'require password after sleep' is greyed out while you have not removed the lock on system settings with administrator.
To Avoid Mac Os X
Step 4: Under General tab, uncheck the option 'Require password after sleep or screen saver begins'.
Now click Apple Menu Sleep to make your Mac sleep and you can see whether it still requires password after waking up from sleep.
To Avoid Mac Os X
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