要強制Mac更新到最新版macOS，可通過終端檢查更新、從蘋果官網下載安裝程序或重置軟件更新設置。首先打開終端輸入sudo softwareupdate --fetch-full-installer命令檢查更新；其次訪問蘋果官網下載對應安裝包直接安裝；最後若更新失敗，可刪除/Library/Preferences/com.apple.SoftwareUpdate.plist和/Library/Updates/目錄內容，並運行sudo softwareupdate --clear-catalog後重啟嘗試。更新前務必使用Time Machine或外部存儲備份數(shù)據(jù)，並確保網絡穩(wěn)定及預留15–20GB空間。

Forcing your Mac to update to the latest macOS isn't always straightforward, especially if you're waiting for a new version to show up in System Preferences. But there are reliable ways to make it happen — whether you want the newest features or need to install critical security patches.

Use the Terminal to Check for Updates Immediately

macOS usually checks for updates once a day by default, but you can force an immediate check using Terminal. This method is fast and works even if you don't see an update showing up in System Settings.

• Open Terminal (you can find it in Applications > Utilities).
• Type this command and press Enter:

   sudo softwareupdate --fetch-full-installer

  This tells macOS to look for the latest full installer available, which often includes major macOS versions.

If an update is found, you'll be prompted to download and install it.

Note: You'll need admin access to run these commands.

Download the Installer Directly from Apple's Website

Sometimes the built-in updater doesn't trigger because it thinks your system is already up to date — even when it's not. In that case, grabbing the latest macOS installer directly from Apple is a solid workaround.

• Go to Apple's official macOS downloads page (or search “download macOS” on Google to find the right one).
• Pick the latest version compatible with your Mac.
• Download the installer and double-click it to start the installation process.

This method bypasses the automatic detection system entirely, so it's great if you're trying to upgrade to a newer macOS version that your machine should support but isn't being offered.

Reset Software Update Settings If It's Stuck

If macOS refuses to check for updates altogether, resetting the software update settings might help. This involves clearing cached data and forcing a fresh connection to Apple's servers.

Here's what to do:

• Shut down your Mac.
• Turn it back on and wait for the desktop to load.
• Delete the com.apple.SoftwareUpdate.plist file located in /Library/Preferences/ .
• Also delete everything inside /Library/Updates/ .

After doing that, open Terminal again and run:

 sudo softwareupdate --clear-catalog

Then restart your Mac and try checking for updates again through System Settings or Terminal.

Don't Forget to Back Up Before Updating

Before jumping into a forced update, make sure you have a recent backup. Something could go wrong during the process, especially if you're installing a beta or early release version.

• Use Time Machine to back up your entire drive.
• Or copy important files manually to an external drive or cloud service.

Also, keep in mind that some forced methods may end up downloading large files over your home network — so make sure you're on a stable Wi-Fi connection and have enough free space on your drive (at least 15–20 GB recommended).

基本上就這些。

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