Please follow these instructions for searching and installing an available update for your iSoftPhone Client.
1. Please click "Help" and then "Check for Update..." in the iSoftPhone menu bar.
2. Subsequently, the following window appears. Please click "Download" to initiate the update process.
3. Please click "Install and Relaunch" to confirm the update.
4. Subsequently, the latest iSoftPhone version is going to be installed on your Mac. Please once restart your iSoftPhone client to use the latest version.