macOS update not showing up in Software Update

Before updating macOS, you should back up your Mac. 1. Use TimeMachine to make a complete backup, insert the external hard disk and enable automatic regular backup; 2. Manually back up important files to cloud storage or external devices, and give priority to backing up documents, photos, bookmarks and other key information; 3. Create a bootable macOS installation disk for system repair or reinstallation, prepare a 16GB USB disk and run terminal commands to create. Backup can effectively prevent update failure or data loss, and it is more secure to prepare in advance.

Connecting a second monitor when installing a Windows system will not affect the installation process, but the following things need to be paid attention to to ensure that the dual screens work normally: 1. There may be only one screen display during the installation process, and the main display device in the BIOS can be adjusted or the interface can be replaced; 2. After the installation is completed, select the display mode through Win P, and adjust the resolution, position and main display in the display settings; 3. If there is a black screen or unrecognizable situation, check the cable, update the driver or enter safe mode to reinstall the driver; 4. When using monitors with different resolutions, set the appropriate zoom ratio and enable the zoom repair option to optimize the display effect.

To clean macOS update files, you can manually delete the update packages in /Library/Updates and /var/folders, or use the terminal command sudorm-rf/Library/Updates/* to delete them, or use CleanMyMacX, DaisyDisk and other tools to clean up the system cache; however, be careful to confirm that the update has been completed before deletion and keep the necessary files for rollback.

Installing macOS to Dell laptops is feasible but requires hands-on ability. 1. Prepare supported Dell laptops, USB drives, macOS environments and EFI files; 2. Use OpenCore or UniBeast to create a boot disk and adjust the BIOS settings; 3. Handle driver problems such as graphics cards, network cards, etc. when installing the system; 4. Use configuration tools to optimize EFI repair power management; 5. Pay attention to system update compatibility during daily maintenance and use the community to solve problems.

Installing macOS to VMwareFusion virtual machine requires preparation tools and the correct steps. 1. Prepare macOS computer, VMwareFusion (recommended Pro version), legal macOS installation images and Unlocker tools; 2. Select the correct system type when creating a virtual machine and allocate disks, memory and CPU reasonably; 3. If it cannot be started, use Unlocker to patch to support macOS; 4. If there is a black screen, formatting problem or network failure during the installation process, you can solve it by adjusting the monitor settings, formatting the disk and configuring the network mode; 5. After the installation is completed, install VMwareTools in time and optimize the settings, including shared folders, fixed resolutions and system updates.

When the prompt "Windowscannotfind the Microsoft Software LicenseTerms" appears, the main reason is that the system cannot find the license agreement file. The solution is as follows: 1. Check whether the installation media is complete, use official tools to remake the boot USB flash drive and verify the ISO hash value; 2. Manually add the license agreement file, copy license.rtf from a normally running Windows computer to the installation media and ensure that the version matches; 3. Change the BIOS settings, try to switch the startup mode or turn off the SecureBoot function; 4. Avoid using a third-party streamlined system, it is recommended to use the standard ISO image provided by Microsoft's official website to avoid component missing problems

Choose"Custom:InstallWindowsonly(advanced)"forfullcontrol,asitallowsacleaninstallthatremovesoldissuesandoptimizesperformance.2.Duringsetup,managepartitionsbydeletingoldones(afterbackingupdata),creatingnewpartitions,formatting(usingNTFS),ors

If the device is not in Apple's official support list, you can install macOS on old Macs through OpenCoreLegacyPatcher (OCLP). The specific steps are as follows: 1. Confirm the device compatibility, such as MacBookPro, iMac or Macmini around 2012, and check whether the motherboard chipset supports EFI mode; 2. Prepare a 16GB or larger USB drive and make a macOS installation USB drive, write to the image using official commands or third-party tools; 3. Download and run OCLP, select the target device for patch processing, automatically solve the kernel expansion and driver compatibility issues, and manually adjust the patch options if necessary; 4. Insert the patched USB drive, press the Option key when restarting