关于“xx.xx已被OS X使用，无法打开”的问题

Mac电脑上的文件拷贝到移动硬盘，有时候会出现“xx.xx已被OS X使用，无法打开”的问题。

解决办法：

1、打开终端(或在Mac搜索里面输入Terminal);

2、在终端里输入 xattr -l ，然后把出问题的文件拖动到 "xattr -l 后面",回车；

localhost:~ Kingdev$ xattr -l

localhost:~ Kingdev$ xattr -l /Users/liuxianzhi/Desktop/屏幕快照 2016-03-12 21.37.25.png

3、然后，第一行会有 com.apple.FinderInfo 这串字符。复制这串字符，回车；

    localhost:~ Kingdev$ xattr -l /Users/liuxianzhi/Desktop/屏幕快照 2016-03-12 21.37.25.png
    com.apple.FinderInfo:
    00000000  00 00 00 00 00 00 00 00 00 10 00 00 00 00 00 00  |................|
    00000010  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  |................|
    00000020
    com.apple.metadata:kMDItemIsScreenCapture:
    00000000  62 70 6C 69 73 74 30 30 09 08 00 00 00 00 00 00  |bplist00........|
    00000010  01 01 00 00 00 00 00 00 00 01 00 00 00 00 00 00  |................|
    00000020  00 00 00 00 00 00 00 00 00 09                    |..........|
    0000002a
    com.apple.metadata:kMDItemScreenCaptureGlobalRect:
    00000000  62 70 6C 69 73 74 30 30 A4 01 02 03 04 23 40 72  |bplist00.....#@r|
    00000010  D0 00 00 00 00 00 23 40 76 C0 00 00 00 00 00 23  |......#@v......#|
    00000020  40 77 D0 00 00 00 00 00 23 40 38 00 00 00 00 00  |@w......#@8.....|
    00000030  00 08 0D 16 1F 28 00 00 00 00 00 00 01 01 00 00  |.....(..........|
    00000040  00 00 00 00 00 05 00 00 00 00 00 00 00 00 00 00  |................|
    00000050  00 00 00 00 00 31                                |.....1|
    00000056
    com.apple.metadata:kMDItemScreenCaptureType:
    00000000  62 70 6C 69 73 74 30 30 59 73 65 6C 65 63 74 69  |bplist00Yselecti|
    00000010  6F 6E 08 00 00 00 00 00 00 01 01 00 00 00 00 00  |on..............|
    00000020  00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00  |................|
    00000030  00 00 12                                         |...|
    00000033

4、接下来，输入新的命令 xattr -d com.apple.FinderInfo 再把问题文件拖进去，问题就解决了

localhost:~ Kingdev$ xattr -d com.apple.FinderInfo /Users/liuxianzhi/Desktop/屏幕快照 2016-03-12 21.37.25.png

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