Fix path on MacOS

Credit: discordjs#113

Author: Benricheson101

src/transports/ipc.js

@@ -1,5 +1,7 @@
 'use strict';
 
+const os = require('os');
+const path = require('path');
 const net = require('net');
 const EventEmitter = require('events');
 const fetch = require('node-fetch');
@@ -17,6 +19,15 @@ function getIPCPath(id) {
   if (process.platform === 'win32') {
     return `\\\\?\\pipe\\discord-ipc-${id}`;
   }
+
+  if (process.platform === 'darwin') {
+    let tmpdir = os.tmpdir();
+    if (!tmpdir.endsWith('/T')) {
+      tmpdir = path.dirname(tmpdir);
+    }
+    return `${tmpdir}/discord-ipc-${id}`;
+  }
+
   const { env: { XDG_RUNTIME_DIR, TMPDIR, TMP, TEMP } } = process;
   const prefix = XDG_RUNTIME_DIR || TMPDIR || TMP || TEMP || '/tmp';
   return `${prefix.replace(/\/$/, '')}/discord-ipc-${id}`;