如果想要在 Mac OS 玩玩 Steam，卻不幸在安裝時出現「steam needs to be online to update」的錯誤，而且明明網路就沒問題，怎麼辦？

網路上找到兩種解法，我個人是用第二種解決：

簡易刪除法

1. Finder 找到 <user>/Library/Application Support/Steam</user> 目錄
2. 刪除 registry.vdf
3. 重新開啟 Steam

來源 How to: Fix Steam Needs to be Online to Update pop up

套件更新法

Step 1: 下載

http://cdn.store.steampowered.com/public/client/public_all.zip.bdf97deae1c4a1de274011b11e0ac9f8336e1b6d
http://cdn.store.steampowered.com/public/client/webkit_osx.zip.98b47456b0de2d7e7f234f10649087f51cb53f1d
http://cdn.store.steampowered.com/public/client/bins_osx.zip.c142c18f1d54fa969d0f8dc50e6956560ffd9a25

Step 2:

並複製到 Finder -> 應用程式 -> Steam 右鍵顯示套件內容 -> Contents / MacOS / package

Step 3:

重新開啟 Steam。

來源 Chris Oliver – OSX Error: steam needs to be online to update.