直接搬运没有意义，直接放链接。地址：https://bbs.feng.com/read-htm-tid-11677019.html

若无法访问请使用网页截图备份。地址：https://img2018.cnblogs.com/blog/1145766/201905/1145766-20190519195035456-1786998824.png

若原文工具无法访问或无法下载。地址：https://files.cnblogs.com/files/zhuxiaoxi/FixEDID.7z

亲测可用，附上自己显示器的修改结果。

/System/Library/Displays/Contents/Resources/Overrides/DisplayVendorID-1e6d/DisplayProductID-59f1

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>DisplayProductID</key>
    <integer>23025</integer>
    <key>DisplayProductName</key>
    <string>LG 25UM58 LCD</string>
    <key>DisplayVendorID</key>
    <integer>7789</integer>
    <key>IOGFlags</key>
    <integer>4</integer>
    <key>edid-patches</key>
    <array>
        <dict>
            <key>data</key>
            <data>
            AAAAEAAAAAAAAAAAAAAAAAAA
            </data>
            <key>offset</key>
            <integer>72</integer>
        </dict>
    </array>
    <key>scale-resolutions</key>
    <array>
        <data>
        AAAQAAAABsAA
        </data>
        <data>
        AAAMgAAABUYA
        </data>
    </array>
    <key>target-default-ppmm</key>
    <real>10.069930100000001</real>
</dict>
</plist>