Macintosh Downloads You must completely disconnect from FirstClass BEFORE installing the new client software. To download the Mac OS X version click here Once the file is downloaded to your Desktop, close all windows, double-click on the attachment you just downloaded and continue with the installation. This step is for new installations ONLY (not upgrades)!!! Once the installation is complete, click here Note: Sometimes, when replying to a message a "Read-Only" error message appears. This is a bug in the current version and is supposed to be fixed shortly. The message still sends as it should. For more information about the Mac OS X FirstClass click here Back To Downloads Page