Kerio Connect
Kerio Connect is a unified communications server and client for macOS that manages email, instant messaging, calendars, contacts, tasks and notes. The Kerio Connect Client is a native desktop application available for both Windows and Mac that provides the same functionality as the browser-based web interface, with support for offline access and tight integration with the operating system. It is typically used by small to medium-sized businesses and organizations looking for an on-premise alternative to cloud-based email and collaboration services. The server component supports both Mac and Windows platforms.
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1 suggestionKerio Connect is an on-premise email and collaboration server that depends heavily on the architecture of the host Mac. Older Kerio Connect releases (version 9.x and earlier) require Rosetta 2 emulation on Apple Silicon Macs and have no native builds — these versions will stop functioning entirely when Apple removes Rosetta 2 in macOS 28 (September 2028). The vendor's support documentation confirms that native Apple Silicon support for Kerio Connect itself has not been implemented, only compatibility workarounds via Rosetta 2. If you are running Kerio Connect Server on an Intel Mac, your system will continue to work until you upgrade your hardware to Apple Silicon or migrate to macOS 28. If you are already on an Apple Silicon Mac, contact GFI (Kerio's parent company) directly to ask about native build availability or supported alternatives before September 2028, as the Rosetta 2 compatibility layer that currently keeps this app running will be removed. For the Kerio Connect Client application (the email/calendar desktop app), check with your server administrator about whether an updated native build is available, as client updates may have been released separately from the server software.
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