topic Re: Harmony Endpoint Security Client E89.21 (E89.20 Hotfix) for macOS is now available as GA in Endpoint

Harmony Endpoint Security Client E89.21 (E89.20 Hotfix) for macOS is now available as GA

Danielle_Allon — Sun, 15 Feb 2026 15:22:01 GMT

Hello,

Check Point Harmony Endpoint Security Client E89.21 (E89.20 Hotfix) for macOS is now available as GA (General Availability).

This Hotfix fixes a macOS Tahoe 26.3 compatibility issue affecting a limited subset of devices running Harmony Endpoint Threat Prevention blades (Anti-Bot and URL Filtering, Anti-Ransomware and Forensics, Threat Emulation).

Customers with devices running Harmony Endpoint with Threat Prevention blades must upgrade to E89.21 before upgrading macOS to 26.3.

For more information refer to sk184676 and sk18430.

Regards,

Danielle Allon | Product Manager

Check Point Software Technologies

Email: danielleal@checkpoint.com

Re: Harmony Endpoint Security Client E89.21 (E89.20 Hotfix) for macOS is now available as GA

Roticer138659 — Sun, 15 Feb 2026 18:37:08 GMT

Thanks for the update. Good to know E89.21 resolves the macOS 26.3 compatibility issue. Upgrading the client before moving devices to 26.3 is a critical reminder for anyone running Threat Prevention blades.

Re: Harmony Endpoint Security Client E89.21 (E89.20 Hotfix) for macOS is now available as GA

the_rock — Sun, 15 Feb 2026 18:57:31 GMT

Great news!

Re: Harmony Endpoint Security Client E89.21 (E89.20 Hotfix) for macOS is now available as GA

the_rock — Mon, 16 Feb 2026 01:51:13 GMT

Just got an email from a customer telling me this version fixed the issue...excellent stuff.

Re: Harmony Endpoint Security Client E89.21 (E89.20 Hotfix) for macOS is now available as GA

tylerspillane — Mon, 16 Mar 2026 16:22:43 GMT

Thanks for the update. Is there any CHKP documentation on supporting apple's new m5 chip? We are aware that 26.3 is supported GA with e89.21, but would like to confirm compatibility prior to deployment on m5s running tahoma.

Re: Harmony Endpoint Security Client E89.21 (E89.20 Hotfix) for macOS is now available as GA

PhoneBoy — Mon, 16 Mar 2026 20:21:57 GMT

The only time a processor might be "incompatible" is if it's a completely different architecture (e.g. the difference between Intel Macs and Apple Silicon ones).
In this case, it's still Apple Silicon, therefore would be supported.