BigBusiness 16 is ready for 2026 and MacOS 26 Tahoe and includes Fast Networking.

For a smooth transition, BigBusiness 15 continues and Subscriptions lets you choose. Keep your old computers longer. Move forward when you want to pick up the pace.

A new Database means new core functions to leverage such as Fast Networking or AI. You may choose improvements to integration, to automation, to grow when you need.


Apple Mail lets you drag single messages to BigBusiness and drop on the Docs folder. This attaches them to any entry in BigBusiness so you or others can open, read, reply.

On macOS this requires your permission for BigBusiness to control your Apple Mail. Please click Allow on the dialog pictured. This pops up the first time you drag email.

If you don't see the Docs folder on each window in BigBusiness check your MyPrefs.


Local Network is protected by new macOS. BigBusiness 16 Server needs permission to broadcast availability and allow connection from Clients, so please Allow if asked.


Rounded Buttons in Icon Prefs like Classic or Xi needed more space to display fully.

This fix is in the new Database in BigBusiness 16 and is not fixable in BigBusiness 15.

Icon sets that do not use rounded corners are not affected by this problem. Choose your Icon Prefs in My Prefs founr on the Employee toolbar or on the Contact toolbar.


Fast Networking speeds up your Client connection by reducing latency in encryption.


Windows Installer is as ever only available from our web site and without signing cert.


Database Update for January 2026 is a release version of Database for BigBusiness 16.

Please update all all of your Big Business 16 Clients to BigBusiness 16.025 or higher.


MyStart is a host of changes to help simplify starting a newly installed BigBusiness.

One such change is the option to automatically install and open the Demo Data File.