With the Galaxy Nexus and Android 4.0 Ice Cream Sandwich, Google went ahead and fixed something that was not broken. The company decided to ditch two separate partitions on Android handsets (/data and /sdcard) and instead went with one single unified partition. This move allowed users to use the whole 16/32GB of internal storage space on their handset for either installing apps or for storage purpose. The downside to this move was that there was no USB Mass Storage mode in Ice Cream Sandwich. Users had to use the MTP protocol in Windows to transfer files, which was downright slow compared to UMS.
Windows 7, at least, supports MTP. Mac OS X (Lion/Mountain Lion) does not. This means that if you connect your Android handset to a Mac, nothing will happen. Your phone will simply be charged, but it won’t be detected as a mass storage device or anything, which is downright baffling and confusing for a newbie Android user.
To transfer files to and fro from your Mac to your Android handset or tablet, users will need to install an application from Google on their Mac. Head over to android.com/filetransfer and then download and install the Android File Transfer app on your Mac. Once the app has been installed on your Mac, you can successfully view and transfer files between your Mac and Android device.
Pretty simple, eh? But downright confusing and baffling for a newbie Android user.