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Operation and Maintenance

Mac OS

What is Gatekeeper in macOS and how does it protect me?

Gatekeeper is a security feature in macOS designed to prevent malware from running without user permission. It ensures security by verifying the source and digital signature of the application, and if the application fails to check, it blocks and displays a warning. The specific working principles include: 1. Verify whether the digital signature of the application has been tampered with; 2. Check whether the developer is a legal developer certified by Apple; 3. Block unsigned or untrusted applications from running unless the user allows it manually. Users can adjust the Gatekeeper option in "System Settings > Privacy & Security", including allowing AppStore apps only, allowing apps from certified developers, or allowing apps from any source (not recommended). Although the default settings are suitable for most

Jul 21, 2025 am 01:05 AM

macOS security

How to change the screen resolution on a Mac or external display?

Modifying the screen resolution on a Mac requires system settings and terminal commands. The specific steps are as follows: 1. To change the built-in screen resolution, you need to go to System Settings > Desktop and Screen Saver > Monitor > Advanced... to enable more options; 2. The external monitor can hold down Option and click "Zoom" to detect low resolution and adjust manually; 3. If the resolution cannot be adjusted, you need to check the monitor support, cable interface and graphics card performance to ensure device compatibility. When operating, refer to the equipment instructions to avoid forcibly overclocking affecting the experience.

Jul 21, 2025 am 12:17 AM

mac Screen Resolution

How to use AirDrop and why isn't it working?

The main reasons why AirDrop is not available include that the network and Bluetooth are not turned on, the device is not within the valid range, the device model is too old, the reception settings are restricted, and the system version is too old. To use AirDrop correctly, make sure both devices support this feature, turn on Wi-Fi and Bluetooth, enable AirDrop in the Control Center or Finder and select the Receive object, and then send the file through the Share button. 1. The network and Bluetooth must be turned on at the same time; 2. The device must be within a few meters and there is no obvious obstruction; 3. The iPhone is at least an iPhone5, the iPad is at least a fourth generation, and the Mac is usually a model after 2012; 4. If the reception setting is "Contact only", the other party must be in the address book; 5. Both parties' equipment systems need to be updated

Jul 20, 2025 am 02:42 AM

What is Lockdown Mode in macOS and who should use it?

LockdownModeinmacOSisahigh-securityfeaturedesignedforindividualsatriskoftargetedcyberattacks.Itrestrictssoftwareinteractionsthatcouldbeexploited,blockingFaceTime,messageattachments,backgroundsyncingforiCloud,andsomethird-partyappswithkernelextensions

Jul 20, 2025 am 01:26 AM

macos

How to calibrate an external display on a Mac?

Calibration of external monitors on Mac can be completed through the "Display Calibration Assistant" provided by the system. The path is "Applications > Utility Tools > Monitors", and click "Calibration" on the "Color" tab to start the tool; ordinary users can choose a quick process, and designers and other professional users can enable "Expert Mode" to make detailed adjustments such as gamma value, white dots and tone responses; it is recommended to preheat the monitor for 30 minutes before calibration, and keep the ambient light stable to avoid direct light; if you use a hardware color calibrator such as DatacolorSpyder, you can use the software to improve accuracy; after calibration is completed, you need to set and confirm the correct ICC color configuration file. It is recommended to mark the monitor model for identification when naming; if the color still deviates, you should recalibrate it.

Jul 20, 2025 am 12:29 AM

mac 显示器校准

How to create a bootable macOS USB installer?

To create a macOS boot disk, you need to prepare a USB disk of more than 16GB and format it as a MacOS extension (log type); download the corresponding macOS installer such as Ventura or Monterey; use the terminal to run the createinstallmedia command to create a startup disk; after completion, check whether the USB disk generates system files or restarts through the Option key to verify whether it is successful. The entire process requires attention to version compatibility, correct paths and operation details to avoid failure due to spelling errors or device problems.

Jul 20, 2025 am 12:25 AM

Boot disk production

How to show the full file path in the Finder title bar?

There are three ways to display the full file path in Finder in macOS: 1. Check "Show full path in the window title bar" in the advanced options of Finder preferences to enable it directly; 2. Execute the command defaultswritecom.apple.finder_FXShowPosixPathInTitle-boolYES through the terminal and restart Finder to achieve a wider version of support; 3. Use the shortcut key Command Option C to temporarily copy the current path, or right-click the folder icon in the upper left corner to view the path navigation. Selecting the appropriate method according to the system version and personal needs can make it more efficient to operate the file path.

Jul 19, 2025 am 03:43 AM

finder file path

How to show hidden files and folders in Finder?

Showing hidden files and folders can be achieved in Finder in a variety of ways. 1. Use the shortcut key Command Shift. You can temporarily switch the display status of hidden files, which is suitable for quick viewing; 2. Enter the command defaultswritecom.apple.finderAppleShowAllFilesYES through the terminal and restart Finder can achieve permanent display, but it is not recommended to enable it for a long time to prevent misoperation from affecting the stability of the system; 3. Use third-party tools such as HiddenMe, OnyX or TinkerTool to provide a graphical interface to switch the display status, which is suitable for users who are not familiar with the terminal. Each method has its own applicable scenarios, shortcut keys are the most convenient, terminal settings

Jul 19, 2025 am 02:07 AM

finder Hidden files

How to manage and view saved passwords in macOS Keychain?

View and manage saved passwords in macOS, which can be operated through the Keychain Access app. The specific steps are as follows: 1. Open "Keychain Access", select "Login" keychain, double-click the target project and check "Show Password" to view; 2. Right-click the password when exporting the password, select "Export", save it as .keychain or .p12 format, and set a protection password; 3. When forgetting your password, you can search in the keychain to confirm whether it has been saved; 4. Regularly clean useless entries, add notes, set automatic locking, and enable iCloud synchronization to optimize management. When viewing and exporting, you need to pay attention to authorization and security risks to ensure that information is properly kept.

Jul 19, 2025 am 01:55 AM

Password management

How to clean a MacBook keyboard and screen safely?

Cleaning the MacBook keyboard and screen requires the right method to avoid damage to the device. First turn off the machine and then operate. Use a soft brush to swipe the key seam, and use a dust-tight roller or tape to remove stubborn dust. It can be supplemented with air blowing balls to blow away deep dust, but do not use a high-power vacuum cleaner. When cleaning the screen, use only a small amount of detergent with a microfiber cloth, spray it on the cloth first and then wipe it to avoid detergents containing alcohol or irritating ingredients. Use dry cloth to gently wipe your fingerprints in daily life, and do not use glasses cloth. At the same time, develop good habits, such as not eating slag food on the keyboard, checking for debris regularly, avoiding using it in dusty places, and covering the cover with protective cover against dust.

Jul 19, 2025 am 12:05 AM

清洁键盘清洁屏幕

How does Universal Control work between a Mac and iPad?

UniversalControlallowsyoutocontrolbothyourMacandiPadwithonemouseandkeyboard.1.EnsurebothdevicesareupdatedtomacOSMonterey12.3andiPadOS15.4orlater.2.TurnonBluetoothandWi-Fionbothdevices.3.SigninwiththesameAppleID.4.Placedevicesnexttoeachother.5.EnableU

Jul 18, 2025 am 03:33 AM

Mac iPad

How to free up disk space on a Mac?

Cleaning up Mac hard disk space can start with four aspects: cleaning "other" files, deleting large or old files, uninstalling unused apps, and enabling iCloud to optimize photo storage. 1. Enter the storage management to view the "Other" category, manually delete the cache or use cleaning tools to process it; 2. Delete useless large files by size through Finder and organize the desktop and download folders; 3. Drag and uninstall and use software to remove residuals or use special tools to clear the residue; 4. Turn on iCloud photo optimization to transfer the original film to the cloud to save local space, and pay attention to whether the iCloud capacity is sufficient.

Jul 18, 2025 am 03:09 AM

mac disk space

Can I run Windows applications on a Mac?

Yes,youcanrunWindowsapplicationsonaMacusingseveralmethods.1.UseBootCamptoinstallWindowsnativelyonIntel-basedMacsforbestperformancewithheavy-dutyapps,thoughitrequiresrebootingandaWindowslicense.2.RunavirtualmachinewithappslikeParallelsDesktoporUTMtous

Jul 18, 2025 am 02:09 AM

windows mac

How to boot a Mac in Safe Mode?

The core operation of starting the Mac into safe mode is to hold down a specific key when powering on, and start the system in a more restrictive state for troubleshooting and fixing problems. 1. Safe mode is the diagnostic mode of macOS, which loads at least drivers and services, skips non-essential startup items and automatically checks disk permissions, helping to determine whether the problem lies in the system or third-party software. 2. The entry method varies depending on the chip: the Intel chip Mac needs to hold down the Shift key immediately after booting, while the AppleSiliconMac needs to hold down the power button to enter the startup option and select "Safe Mode". 3. In safe mode, you can perform operations such as uninstalling new software, deleting suspicious login items, cleaning caches, and repairing disks, but some functions may be limited. 4. Exit only needs to be normal

Jul 18, 2025 am 01:22 AM

mac