Safari 變慢的常見原因及解決方法如下。 1. 過時(shí)的擴(kuò)展或插件可能拖慢瀏覽器，建議禁用所有擴(kuò)展並逐一啟用以排查問題插件，同時(shí)移除或更新不再維護(hù)的擴(kuò)展；2. 系統(tǒng)更新可能導(dǎo)致緩存或網(wǎng)站數(shù)據(jù)損壞，可通過清除網(wǎng)站數(shù)據(jù)和緩存來解決；3. 更新可能影響DNS 或網(wǎng)絡(luò)設(shè)置，嘗試更換為公共DNS 並重連網(wǎng)絡(luò)；4. 後臺(tái)進(jìn)程或標(biāo)籤頁(yè)過多也會(huì)導(dǎo)致性能下降，建議使用標(biāo)籤組整理標(biāo)籤頁(yè)、減少後臺(tái)加載，並通過活動(dòng)監(jiān)視器檢查Safari 的資源佔(zhàn)用情況。多數(shù)情況下，清除緩存和禁用擴(kuò)展即可解決問題，且有時(shí)只需等待一兩天讓Safari 適應(yīng)新系統(tǒng)即可恢復(fù)正常。

Safari feeling sluggish after a macOS update is actually pretty common. It's usually not just you or your machine—it often comes down to how the browser interacts with the new system changes. While Safari is built for macOS and should run smoothly, updates can mess with caches, extensions, or even default settings in unexpected ways.

Here are some of the most likely reasons why Safari might be dragging its feet post-update—and what you can do about it.

1. Outdated Extensions or Plug-ins

Extensions and plug-ins that worked fine before might not play well with the updated version of Safari. Some of them may try to load outdated scripts or run background processes that slow things down.

What to do:

• Go to Safari > Preferences > Extensions
• Disable all extensions first, then re-enable them one by one to find the culprit
• Remove or update any extensions that aren't maintained anymore

You don't need many extensions anyway—especially ad blockers or trackers that constantly scan pages can add noticeable lag.

2. Corrupted Cache or Website Data

After an OS update, cached files and cookies can sometimes become incompatible or corrupt. This affects how fast Safari loads pages, especially ones you visit often.

How to clear cache and website data:

• Open Safari > Preferences > Privacy
• Click “Manage Website Data”
• Hit “Remove All” to clear stored cookies and site data
• Then go back and click “Develop > Empty Caches” (if you don't see Develop, enable it via Preferences > Advanced)

This resets Safari's memory of sites, so it'll rebuild the cache as you browse—but it should do so more cleanly this time.

3. DNS or Network Settings Affected by the Update

Sometimes macOS updates tweak network settings behind the scenes, which can affect how quickly Safari connects to websites. A slow DNS lookup can make it feel like pages are loading slowly—even if they're not.

Try changing your DNS:

• Go to System Settings > Network > Wi-Fi (or Ethernet) > Advanced > DNS
• Add a public DNS like:
  • Google DNS: 8.8.8.8 and 8.8.4.4
  • Cloudflare DNS: 1.1.1.1 and 1.0.0.1

It's also worth toggling your Wi-Fi off and on again, or even forgetting and rejoining your network—sometimes the update leaves weird glitches there.

4. Too Many Background Processes or Tabs

If you tend to leave dozens of tabs open, Safari might be struggling under the weight of too many active pages—especially after an update that changed memory handling.

Tips to lighten the load:

• Use Safari's “Tab Groups” to organize and close unused tabs
• Enable Safari > Preferences > General > When visiting a new website, reduce the number of background tabs
• Consider using “Lazy Loading” extensions (though use sparingly)

Also, check Activity Monitor to see if Safari Web Content is using high CPU or memory. If it is, that's a sign something's off with how pages are rendering.

基本上就這些。
Most slowdowns after an update are fixable without needing a full reset or reinstall. Start with clearing cache and disabling extensions—those two steps alone solve the majority of cases. And remember, sometimes it just takes a day or two for Safari to settle in after a big macOS change.

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