How to use Sidecar on Mac and iPad
To truly use Sidecar, you must first confirm that the device supports and connect correctly. 1. Confirm that the Mac is a model and iPad running iPadOS13 or above after 2016, and priority is given to using USB connection to complete the first pairing. 2. Select the extension or mirror mode in the "Display" setting. The extension mode can drag the window to improve multitasking efficiency. 3. Make sure you are paired and enable stylus support in the app when using ApplePencil, paying attention to reducing wireless interference to reduce latency. 4. If you encounter connection problems, check Wi-Fi, Bluetooth, battery power and system version, and try restarting the module or using USB connection to solve the problem. Mastering these key points can significantly improve user experience and work efficiency.
Jul 11, 2025 am 12:56 AM
This Prime Day, I'll Be Replacing My 18-Year-Old Flash Drive
I take organizing my digital life very seriously. I have a system of folders that neatly categorize files and screenshots, all of which are backed up on my cloud storage. From time to time, I also make cold storage backups. Maybe I'm being a little t
Jul 11, 2025 am 12:52 AM
How to disable Windows Ink Workspace
To turn off WindowsInkWorkspace, you can do it by: 1. Turn off or hide icons through the taskbar; 2. Use the Registry Editor to completely disable the function; 3. Use the Group Policy Editor for management; 4. Uninstall relevant application components to reduce interference. Each method is suitable for different needs. Ordinary users recommend giving priority to the first two methods. Group policy management can be used for professional users or enterprise environments. The infrequent but effective method is to uninstall associated applications.
Jul 11, 2025 am 12:50 AM
How to change directory in Linux
The core command to switch directories in Linux is cd. The basic usage includes inputting cd plus a full path or a relative path, such as cd/home/user/Documents or cdDocuments; the quick switching skills include cd~back to the main directory, cd-switch to the previous directory, cd.. Return to the previous directory, cd../.. Return to the two-level directory; when the path contains spaces or special characters, it must be wrapped in quotes or escaped by backslashes, such as cd "MyFiles" or cdMy\Files; in addition, the Tab key can automatically complete the path, and the up and down arrows can call historical commands to reduce duplicate input.
Jul 11, 2025 am 12:49 AM
How to fix 'The application was unable to start correctly' error in Windows 11?
When Windows 11 prompts "The application wasunabletostartcorrectly(0x00007ff81d63263e)" error, it is usually caused by system file corruption, software conflict or compatibility settings. You can troubleshoot and resolve it according to the following steps: 1. Use the sfc/scannow and DISM commands to check and repair the system files; 2. Update or reinstall the graphics card driver, especially NVIDIA or AMD graphics card users can try to use DDU to completely uninstall and reinstall it; 3. Disable full-screen optimization, and check "Disable full-screen optimization" in the compatibility options through the program attributes; 4. Run a clean startup, disable third-party services and startup items to eliminate conflicts;
Jul 11, 2025 am 12:48 AM
How to use Parental Controls on Mac
The parental control function on Apple computers is actually quite practical, especially for families with children. You don't need to install extra software, the system's own features can help you limit usage time, manage applications and filter web content. The key is to set up properly, which can protect children without affecting normal use. How to enable parental control and create a controlled account First of all, you need to create a "controlled" user account on your Mac, which is the prerequisite for enabling parental control. The operation steps are as follows: Open System Settings (SystemSettings) and enter Users and Groups (Users&Groups) and click the unlock icon in the lower left corner, enter the administrator password and click the " " to add new users. After selecting "Managed Users" to create,
Jul 11, 2025 am 12:46 AM
Where is the Windows key on a keyboard
The Windows keys are usually located between the Ctrl and Alt keys on the bottom row of the keyboard, close to both sides of the space bar. It is marked with the Windows logo (an icon similar to a four-grid window frame), which is commonly found on a standard PC keyboard, with one on each side of the left and right; the laptop keyboard usually has one on the left and may be slightly smaller; the Mac keyboard is replaced by the Command key in BootCamp mode; its functions can be achieved through software remapping of non-Windows keyboards. Press the Windows key to open the Start menu, such as Windows D display desktop, Windows E launches file explorer, Windows L locks the computer, Windows Tab opens the task view, providing a variety of improved operational effects
Jul 11, 2025 am 12:45 AM
How to fix Windows Installer service could not be accessed
When encountering the "WindowsInstallerservice could not beaccessed" error, first check whether the WindowsInstaller service is running normally. The specific operation is to open the service list to find the service, set the startup type to "Manual" and start it; secondly, use the administrator permission to run the command prompt, and execute the sfc/scannow and DISM/Online/Cleanup-Image/RestoreHealth commands to repair the system files; if the problem remains the same, you can re-register the installation service through msiexec/unregister and msiexec/regserver; finally,
Jul 11, 2025 am 12:39 AM
Can I reuse a Windows product key on another computer?
Yes,youcanreuseaWindowsproductkeyonanothercomputerdependingonthelicensetype.Retaillicensesaretransferablebetweencomputers,sodeactivatetheoldinstallation,installWindowsonthenewmachineusingthesamekey,andcontactMicrosoftsupportifneeded.OEMlicensesaretie
Jul 11, 2025 am 12:39 AM
How to open or close a port in firewalld?
To open or close a port in a firewalld firewall, use the firewall-cmd command and pay attention to the region and permanent configuration. 1. Check the firewall status and default areas: sudofirewall-cmd-state and sudofirewall-cmd-get-default-zone; 2. Open temporary port: sudofirewall-cmd--add-port=3000/tcp; 3. Open permanent port: sudofirewall-cmd-permanent-add-port=3000/tcp and execute sudofirewall-cmd--relo
Jul 11, 2025 am 12:30 AM
How to fix a flashing folder with a question mark on Mac startup
A flashing folder with a question mark appears when the Mac boots up, indicating that the system cannot find the bootable macOS. 1. First confirm whether the boot disk is connected normally and try to replace the cable or interface; 2. Enter recovery mode to use "Disk Tool" to repair the boot disk or reinstall macOS; 3. Specify the correct boot disk through terminal commands or system preference settings; 4. If it still cannot be resolved, it may be that the disk is damaged or the system crashes, and you need to backup and restore, check the hard disk or send it to repair.
Jul 11, 2025 am 12:22 AM
How to set or change environment variables?
The way to set or change environment variables varies by operating system, but the core steps are consistent. In Windows, you can set it through system properties (right-click "This Computer" > Properties > Advanced System Settings > Environment Variables) or command line (use set with temporary variables, use setx with permanent variables); in macOS/Linux, you need to add export statements in shell configuration files (such as ~/.bashrc or ~/.zshrc) and overload the configuration; you can set locally in applications or scripts, such as using export in shell scripts, and use os.environ in Python; in addition, you can use set (Windows) or printenv
Jul 11, 2025 am 12:18 AM
What is the Out-of-Memory (OOM) Killer and how to tune it?
OOMKiller is a mechanism for Linux systems to terminate processes when memory is exhausted to prevent crashes. It can protect critical processes from being killed by adjusting the oom_score_adj value, and optimize system-level memory management through overcommit settings. It is scored based on factors such as process memory usage and importance. The higher the score, the easier it is to be killed; to prevent key processes from being killed, the oom_score_adj can be set to -1000; the overcommit_memory policy can be adjusted at the system level, limit memory and swap usage, and monitor OOM events through dmesg. In Kubernetes or Docker environments, you need to pay attention to the interaction effect of resource quotas and cgroups.
Jul 11, 2025 am 12:12 AM
What is the difference between the Beta and Dev channels for Windows 11?
The Beta and Dev channels of Windows 11 are different and are suitable for users with different needs. The Beta channel provides updates close to the official version, with high stability, suitable for ordinary users who want to experience new features in advance but still need to stabilize the system; while the Dev channel is suitable for developers or technology enthusiasts, with frequent and unstable updates, often containing unfinished functions and serious errors. Key differences between the two include: 1. The update frequency is higher than the Dev channel; 2. The Beta channel's functionality is closer to the final version; 3. The Beta channel has fewer errors and is not serious; 4. It is easier to roll back from the Beta channel. When choosing, it should be determined based on your tolerance for instability and the purpose of use.
Jul 11, 2025 am 12:07 AM
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