一般來說都是整個復原或單一程式恢復，但相關設定檔復原都沒找到相關文章，以下是由網路找到節錄下的內容

Most user-level preferences you set via System Preferences are in one big file:

*/Library/Preferences/com.apple/systempreferences.plist*

but a few are in separate files, such as:

*/Library/Preferences/com.apple.screensaver.plist*

System-level preferences, such as Time Machine’s preferences, are in separate files in the top-level Library folder:

/Library/Preferences/com.apple.TimeMachine.plist

or one of several files in the sub-folder:

/Library/Preferences/SystemConfiguraton

Other preferences, such as all your Mail accounts, rules, etc., are in separate files at the user level, such as:
有些程式就是放在這個目錄之下
*/Library/Preferences/com.apple.mail.plist*

以Viscosity 這套VPN程式，我的設定檔案就放在這裡只要至這個目錄下再啟動Time Machine 就可以復原原本的設定檔。