Print JSON from LLDB

.lldbinit

...
command script import ~/.lldb/print_json.py

# Then restart Xcode

Example

(lldb) pj @{ @"Hello" : @"World!" }
$1 = 0x13278bf0 {"Hello":"World!"}
(lldb) 

print_json.py

#!/usr/bin/env python
# Goes in ~/.lldb/print_json.py

import lldb
import commands

def print_json(debugger, command, result, internal_dict):
  lldb.debugger.HandleCommand("po [[NSString alloc] initWithData:(id)[NSJSONSerialization dataWithJSONObject:(" + command + ") options:0 error:nil] encoding:4]")

def __lldb_init_module(debugger, internal_dict):
  debugger.HandleCommand("command script add -f print_json.print_json pjson")
  print "print_json installed."