macOS provides multiple methods to protect the data on a Mac: a user account password, encryption via FileVault, and optional low-level security measure that prevents starting up from storage devices other than the selected startup disk. That's known as the firmware password or EFI (Extensible Firmware Interface) lock, which will also block the user's ability to use all startup key combinations, except the NVRAM or PRAM reset combinations. This command (Option + Command + P + R), however, will initiate the machine from macOS Recovery instead.
Guidelines to lock photos on Mac system using Remo MORE app. Step 1: Download and install the Remo MORE app on your Mac system and start it. Choose 'Manage” option form the welcome screen. Next, you have to choose 'File Manager' from the second window as depicted in.
The Lost Mode feature of Find My Mac will remotely lock the Mac with a firmware password for one-time use. The user's Mac receives the lock instruction from iCloud, restarts, and asks for the system lock PIN code that they set up. After entering the passcode the Mac starts up from the designated startup disk and disables the passcode.
Apple's standard lock-screen image with OS X El Capitan (and Yosemite before it) is a blurred version of your desktop wallpaper. If you have grown tired of this look, then you can add your own. Unable to open locked images in Mac. Unable to open locked images in Mac. Asked By Josh Pikee 0 points N/A Posted on -. Hello Experts, I have failed to open an image and some other files, received from Mac, on my computer. It says the files are locked. I searched the property of the files.
Download CleanMyMac X from MacPaw’s website and clean up to 500MB of junk data from your computer while enjoying all the features of the software without major limitations.
A firmware password is not the same as the administrator password or login password. It's a separate password that appears immediately after boot and must be entered into the system lock screen, which appears as a lock symbol on either a black or a gray background.
Firmware Passcode Security
Low-level passwords are quite secure, which also means there is potentially a headache if the password is forgotten. If you or any of your users can't remember the firmware password or passcode, know that Apple doesn’t allow for any workarounds, but instead recommends scheduling a service appointment with an Apple Store or Apple Authorized Service Provider. The process requires the original receipt or invoice as proof of purchase.
Earlier versions of macOS required manual installation of the firmware but, starting in 2015, Apple began bundling EFI updates with the macOS updates in order to deliver security patches to all users. But as security firm Duo Labs discovered in late 2017, some Macs aren't getting the right firmware, which makes them vulnerable to hackers. They recommend checking the firmware version and updating if needed.
Image Lock For Mac Os
Firmware Passcode Location
On Intel-based Macs shipped before 2011, the firmware password was stored in the PRAM and read by the system EFI firmware before other PRAM variables. That lead to a serious security issue, allowing the firmware to be revealed in a native macOS app and weakening the enhanced security Apple had hoped to introduce with the addition of the firmware password.
In 2011, however, Apple added an important change to the system: the firmware password was moved to a separate programmable controller from Atmel. This component contains lockable flash memory to store the password and requires special programming with identifier numbers for both the Mac's motherboard and the Atmel chip to access and reset it.
Since the controller is an independent component, the only way to bypass it is to manually remove it from the motherboard, but this requires highly precise reflow soldering tools and techniques.
Bypassing the Mac Firmware Password on MacBooks With Upgradeable RAM
This hardware hack works on both Intel- and Motorola-based MacBooks and requires users to remove the RAM and reinstall it. You can check our guide on how to remove the RAM on MacBooks for further reading.
- Shut down your computer and remove the battery.
- Locate your RAM, remove one of the RAM modules and put it aside.
- Put the battery in, and boot your computer while holding the Command + Option + P + R keys to reset the parameter RAM.
- Wait for the chime to sound three times.
- Release the keys and shut down the computer.
- Remove the battery again, and reinsert the RAM module.
- Put the battery back in.
- Boot up your Mac, and you should not see the firmware lock again.
Disable the Password With Firmware Password Utility
- Restart your Mac while holding down the Command + R keys to enter Recovery Mode.
- When the Utilities screen appears, go the Utilities menu bar, and select “Firmware Password Utility”.
- Choose to turn the Firmware Password off.
If none of the above methods worked, there are still two more options to try: either have Apple do it for you, so long as you have the original receipt or invoice, or alternatively use any of the EFI lock bypass hardware kits available for sale on various sites. In using one of these EFI lock hardware bypass methods you’ll almost certainly void your warranty, so it is down to you whether you want to risk the procedure.
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Apple released the macOS 10.14 Mojave update with several features and optimizations. It took me over a week to discover and tweak most of them. One of the first things I did was to customize the lock screen on my MacBook Air running Mojave.
![Lock screen key mac pro Lock screen key mac pro](/uploads/1/2/7/7/127779822/781350274.jpg)
The entire activity barely took a couple of minutes, and now my MacBook Air's lock screen looks more personal than ever. Thankfully, Mojave continues to offer a few ways to change the lock screen look and options from the vanilla one offered out of the box.
Pro Tip: If you use the lock screen for privacy reasons, then consider enabling FileVault, the disk encryption setting, through System Preferences > Security & Privacy > FileVault and click on Turn on FileVault button.Let's start with an easy option.
Change the Desktop Wallpaper
A large wallpaper can make the desktop look crisp and clear. Get a wallpaper in at least Full HD resolution for MacBook Air and 4K resolution for MacBook as well as MacBook Pro.
Tip: We recommend using at least 4K UHD (3840x2160) in case you plan to connect your MacBook, MacBook Air or MacBook Pro to a 4K monitor or TV. You'll need a 5K wallpaper for the 5K iMacs.Step 1: Right-click on the desktop and select Change Desktop Background from the context menu.
Step 2: Navigate to the wallpaper or pick in anyone from the available album folders as your wallpaper.
Step 3: Click on the Apple Menu and select Lock Screen to confirm that the new wallpaper is visible on the lock screen. Alternatively, you can press Control+Command+Q shortcut keys to lock the screen.
I chose an official Firewatch game's wallpaper for my desktop as the lock screen background.
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Read MoreChange the User Account Picture
Apple provides about 43 different images to choose as your account photo which is visible at the lock screen and the login screen. You can set a custom photo which could be your picture or anything else. Here's how you can change the user account picture.
First of all, you must add the image you want to put as your User account image in the Photos app.
Mac Lock Computer
Tip: Using a square image with 700x700 pixel resolution yielded better results to set at the User account picture replacement.Transfer the image(s) to the Photos app and then follow these steps:
Step 1: Click on the Apple Menu and choose System Preferences.
Step 2: Head to User & Groups.
Step 3: Click on the current User account image, and it will roll out a photo selection menu.
Step 4: Select Photos. Now keep scrolling the left pane containing thumbnails till you see the new images you added at the bottom. Select the one you want to use and hit next.
You can take a picture of yourself using the camera and set it as your account photo.
Step 5: Use the zoom slider to align the image correctly and hit Save when you are satisfied.
Now you can use the Control+Command+Q shortcut to view the lock screen and check your new User account image.
Add a Message or Text on the Lock Screen
MacBooks are lightweight, convenient to carry around, and easy to forget at airports, cafes or conferences. How can one identify whose laptop it is and reach out to the rightful owner? Well, you can leave a custom text message on the lock screen that would help anyone to reach out to you and return your laptop.
Such custom text is also an excellent way to leave cheeky a message for your sneaky sibling or a co-worker. Here's how you can set one:
Step 1: Go to System Preferences using the Apple menu and click on Security & Privacy.
Step 2: Click on the lock icon at the bottom right corner of the window to unlock the setting and enter the administrator password.
How To Lock Mac Computer
Step 3: Check the second option that states 'Show a message when the screen is locked' and click on the Set Lock Message button.
Step 4: Add text in the field, hit the OK button and finally click on the lock icon to lock it back.
You can access the lock screen using Control+Command+Q shortcut and view the custom text on the lock screen.
Password Protect After Screen Saver Starts
Often we prefer to use a screen saver and select the Mac system to automatically go to sleep mode when not in use. The screen saver or the sleep mode do not activate the lock screen by default. So anyone can take advantage of that and gain access to your system. To avoid that, you can set a password requirement whenever the computer goes into sleep mode or after the screen saver starts.
Step 1: Go to System Preferences from the Apple Menu.
Step 2: In the Security & Privacy settings, check the first box for Require password and pick a preferred time from the drop-down menu.
Now you can step away from your Mac without worrying about someone being sneaky.
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Read MoreAll Glam, No Sham
The macOS 10.14 Mojave allows using a few tricks with the lock screen. While most are quite simple and efficient, one needs to set the screen saver and energy saver settings smartly to make the best of them.
The only thing missing is notification support — mostly for emails, Slack and few other productivity apps. Indeed, just like the lock screen on an iPhone, iPad, or an Android-based smartphone. Most importantly, the ones that can hide sensitive information like on Android and iOS lock screens. However, if you come across a good one, do share with us in the comments section below.
The above article may contain affiliate links which help support Guiding Tech. However, it does not affect our editorial integrity. The content remains unbiased and authentic.Read NextHow to Prevent a Mac From Connecting to the Wrong Wireless NetworkAlso See#macos #customization
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