Mac OS X的“压缩”选项VS命令行压缩（为什么他们产生不同的结果？）(Mac OS X 

我注意到，在命令行“拉链”的工具和Mac OS X的“压缩XXX”选项（通过取景器中右键点击可）是给不同的输出文件。 不仅是文件中的几百个字节更大的尺寸，但内容是显著不同的。

我怎样才能找出命令Finder是使用压缩？

Answer 1:

看看一个AppleScript压缩一个Finder选择的文章。

try
    tell application "Finder"
        set theSelection to the selection
        set selectionCount to count of theSelection
        if selectionCount is greater than 1 then
            error "Please select only one Finder item before running this script."
        else if selectionCount is less than 1 then
            error "Please select one Finder item before running this script."
        else
            set theItem to (item 1 of theSelection) as alias
            set destFolder to (container of theItem) as alias
            set itemName to name of theItem
        end if
    end tell

    do shell script ("ditto -c -k --sequesterRsrc --keepParent " & quoted form of POSIX path of theItem & space & quoted form of (POSIX path of destFolder & itemName & ".zip"))
on error theError
    tell me
        activate
        display dialog "Error: " & theError buttons {"OK"} default button 1 with icon stop
    end tell
end try

Answer 2:

答案是man ditto ：

 The command:
       ditto -c -k --sequesterRsrc --keepParent src_directory archive.zip
 will create a PKZip archive similarly to the Finder's Compress function-
 ality.

文章来源: Mac OS X 'compress' option vs command line zip (why do they produce different results?)