iPhone toolkit
How to access the iPhone's filesystem on your Mac (AFP)
Make sure your device is connected to the internet. Download the application AFPd via Installer.app. (Source: psmxy.org/iphone-apps)
Open the AFPd application on your device. 
Turn the AFP Server on and give a service name to your device.
Now your device shows up in the Finder sidebar. If that is not the case, choose Go to > Connect to Server (command-K). Type in the IP-address you see in the AFP Server Control Panel (here: 192.168.1.37). 
Click connect and then type in username and password. Username: root, password: alpine (unless you changed them). 
You're done! 
Advantages of this method:
- Easy access via Finder
- No software-installation on the computer needed
- No wire needed
- Works perfectly well
- Access to both the Root and Media partition
Disadvantages:
- Relatively slow (~ 1.5 MB/sec) using an Airport Extreme 802.11n
- Works only with Macs