Sony PC Companion is a tool and PC desktop application you can use to connect your Sony Xperia Z device. The PC Companion contains Xperia Transfer as a file synchronization toll to move your content from iPhone to your Xperia Z if you are come from iPhone. Besides that, it is used to manage your contacts, phone content, messages, media files, photos from desktop PC. Besides that, you can update your Sony Xperia Z firmware via Sony PC Companion, instead of waiting OTA update.
To those who are familiar with Samsung devices, Sony PC Companion is just similar to Samsung Kies. You can direct download the Sony PC Companion for Windows or Mac with direct links below.
Sony PC Companion for Mac (Sony Bridge for Mac, 9.4MB)