Mojave (10.14) 之后的系统，
先创建一个文件 gdb-entitlement.xml，内容为:
<?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>com.apple.security.cs.debugger</key>
<true/>
</dict>
</plist>
</pre>
再执行:
codesign --entitlements gdb-entitlement.xml -fs gdb-cert $(which gdb)