摘要：
我在Windows下工作了很长时间。很自然，Fiddler是捕获包的最佳工具。但Fiddler是在Netruntime环境下运行的，所以很难在Mac上使用它。直到去年10月，Fiddler的OSX版本被悄悄放在Telerik的官方网站上，这让我欣喜若狂，并迅速尝试。要在环境中安装Mono，您需要在MacNet下使用它。编译程序需要跨平台Mono。接下来，如果要运行Fiddler，需要将Mono添加到环境变量中。Fiddler是从Fiddler官方网站安装的https://www.telerik.com/download/fiddler下载打包文件fiddler-mac.zip。
一直以来都是在Windows底下工作，对于抓包工具，自然而然当属Fiddler最最出色。不过Fiddler是在.Net runtime环境下运行的，所以想要在Mac下使用，有些困难。
在试过了Charles、Rythem、TinyProxy和NProxy这些抓包工具后，我依然苦恼，它们有的需要支付昂贵的费用，有的只支持本机网页请求代理，而有些界面只有文本模式，这让我无法适从。
直到去年10月份(2016年10月)，Telerik官网上悄然地放上了Fiddler的OSX版，这让我欣喜若狂，赶紧来尝试。
环境安装
Mono安装
首先，Mac下需要使用.Net编译后的程序，需要用到跨平台的方案Mono(现阶段微软已推出跨平台的方案.Net Core，不过暂时只支持控制台程序)。安装程序可以从http://www.mono-project.com/download/#download-mac地址下载。
安装完后，在Terminal里执行以下命令：
1 | /Library/Frameworks/Mono.framework/Versions/<mono version>/bin/mozroots --import --sync |
此步是为了从Mozilla LXR上下载所有受信任的root证书，存于Mono的证书库里。root证书能用于请求https地址。
接下来如果想要运行Fiddler，还需要把Mono加入到环境变量中。编辑.bash_profile文件：
1 | sudo vi ~/.bash_profile |
加入文本：
1 2 | export MONO_HOME=/Library/Frameworks/Mono.framework/Versions/5.0.1export PATH=$PATH:$MONO_HOME/bin |
保存后重新打开Terminal，Mono环境已装好。
Fiddler的安装
从Fiddler官网https://www.telerik.com/download/fiddler下载fiddler-mac.zip的压缩包。解压到非中文字符的路径下。
Fiddler运行
打开Terminal，进入到刚才解压的Fiddler路径，执行命令运行：
1 | sudo mono Fiddler.exe |
是不是跟Windows下的界面一样好看？
如果启动fiddler：sudo mono Fiddler.exe 报错
WARNING: The Carbon driver has not been ported to 64bits, and very few parts of Windows.Forms will work properly, or at all
Stacktrace:
at <unknown> <0xffffffff>
at (wrapper managed-to-native) System.Windows.Forms.XplatUICarbon.CGDisplayBounds (intptr) [0x00002] in <36fbc38531724d82b10aef6ebafea6e9>:0
at System.Windows.Forms.XplatUICarbon.get_WorkingArea () [0x00005] in <36fbc38531724d82b10aef6ebafea6e9>:0
at System.Windows.Forms.XplatUICarbon.get_VirtualScreen () [0x00000] in <36fbc38531724d82b10aef6ebafea6e9>:0
at System.Windows.Forms.XplatUI.get_VirtualScreen () [0x00000] in <36fbc38531724d82b10aef6ebafea6e9>:0
at System.Windows.Forms.Screen..cctor () [0x00034] in <36fbc38531724d82b10aef6ebafea6e9>:0
at (wrapper runtime-invoke) object.runtime_invoke_void (object,intptr,intptr,intptr) [0x0001e] in <4fdc5ed61a074cafb49fa42deb20d521>:0
at <unknown> <0xffffffff>
at System.Windows.Forms.Form.get_CreateParams () [0x00157] in <36fbc38531724d82b10aef6ebafea6e9>:0
at System.Windows.Forms.Control.CreateHandle () [0x0002a] in <36fbc38531724d82b10aef6ebafea6e9>:0
at System.Windows.Forms.Form.CreateHandle () [0x00000] in <36fbc38531724d82b10aef6ebafea6e9>:0
at System.Windows.Forms.Control.CreateControl () [0x00039] in <36fbc38531724d82b10aef6ebafea6e9>:0
at System.Windows.Forms.Control.SetVisibleCore (bool) [0x0003a] in <36fbc38531724d82b10aef6ebafea6e9>:0
at System.Windows.Forms.Form.SetVisibleCore (bool) [0x00065] in <36fbc38531724d82b10aef6ebafea6e9>:0
at System.Windows.Forms.Control.set_Visible (bool) [0x00009] in <36fbc38531724d82b10aef6ebafea6e9>:0
at System.Windows.Forms.Control.Show () [0x00000] in <36fbc38531724d82b10aef6ebafea6e9>:0
at (wrapper remoting-invoke-with-check) System.Windows.Forms.Control.Show () [0x00031] in <36fbc38531724d82b10aef6ebafea6e9>:0
at Fiddler.frmViewer. (string[]) [0x00081] in <09623c708fdb40a483cea147bbea7a7f>:0
at Fiddler.frmViewer. (string[]) [0x00016] in <09623c708fdb40a483cea147bbea7a7f>:0
at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) [0x0004e] in <09623c708fdb40a483cea147bbea7a7f>:0
Native stacktrace:
0 mono 0x000000010a02c3d1 mono_handle_native_crash + 257
1 mono 0x000000010a093e86 altstack_handle_and_restore + 70
2 SkyLight 0x00007fffaabd4fc2 SLDisplayBounds + 50
3 ??? 0x00000001117e038e 0x0 + 4588438414
4 ??? 0x000000010a62d486 0x0 + 4469216390
5 mono 0x0000000109f865f4 mono_jit_runtime_invoke + 1316
6 mono 0x000000010a17e238 do_runtime_invoke + 88
7 mono 0x000000010a17a2a4 mono_runtime_class_init_full + 996
8 mono 0x0000000109f7fa45 mono_jit_compile_method_inner + 2485
9 mono 0x0000000109f82903 mono_jit_compile_method_with_opt + 1379
10 mono 0x000000010a02e871 common_call_trampoline + 1217
11 mono 0x000000010a02e379 mono_magic_trampoline + 73
12 ??? 0x000000010a41839e 0x0 + 4467032990
13 ??? 0x000000011148b81b 0x0 + 4584945691
14 ??? 0x000000010d8a384f 0x0 + 4522129487
15 ??? 0x000000010d8a34c7 0x0 + 4522128583
16 ??? 0x000000010a62d043 0x0 + 4469215299
17 mono 0x0000000109f865f4 mono_jit_runtime_invoke + 1316
18 mono 0x000000010a17e238 do_runtime_invoke + 88
19 mono 0x000000010a181849 do_exec_main_checked + 137
20 mono 0x0000000109fef32f mono_jit_exec + 287
21 mono 0x0000000109ff1b63 mono_main + 9235
22 mono 0x0000000109f763ad main + 253
23 mono 0x0000000109f762a4 start + 52
Debug info from gdb:
(lldb) command source -s 0 '/tmp/mono-gdb-commands.Cli6iM'
Executing commands in '/tmp/mono-gdb-commands.Cli6iM'.
(lldb) process attach --pid 1326
warning: (x86_64) /Library/Frameworks/Mono.framework/Versions/5.4.1/lib/mono/4.5/mscorlib.dll.dylib empty dSYM file detected, dSYM was created with an executable with no debug info.
warning: (x86_64)
.
.
.
.
.
=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================
Process 1326 detached
(lldb) quit
[1] 1326 abort mono Fiddler.exe解決方案：切换32bit-mono启动fiddler
sudo mono --arch=32 Fiddler.exe