Apple released macOS Tahoe 26.4 this week, and the update introduced disruptive system-wide changes affecting multiple third-party applications. Thanks to advance testing, our engineering team resolved the most significant of these issues before they could reach Blue Border users.
The final release did, however, include a last-minute Keychain security change (CVE-2026-28864) that wasn't disclosed until release day, and it's causing a small number of intermittent issues that we are now working to address. Fixes are anticipated next week.
Recommended Actions
Share the message below with your Mac users to advise them not to update to macOS Tahoe 26.4 until further notice.
Additionally, if you have an Operating System Auto Update Compliance Check in place, follow these instructions to change the check to Recommended to avoid preventing users from logging in if they have already updated.
Please share the following with your Mac users:
Apple recently released macOS Tahoe 26.4, which is currently incompatible with Venn. If you use a Mac for work, please turn off automatic updates and do not update your computer to macOS Tahoe 26.4.
Turn off automatic macOS updates:
- Click the Apple icon in the top left corner of your screen to open the Apple menu.
- Click System Settings.
- On the General settings page, click Software Update.
- Click the ⓘ icon next to Automatic Updates.
- Toggle off Install macOS updates and click Done.
If prompted, enter your device password and confirm or authenticate using Touch ID.
When prompted, do not update to macOS Tahoe 26.4 until we notify you.
If you have already updated to macOS Tahoe 26.4, you will likely be able to continue working normally. However, please contact us if you experience unexpected behavior logging in to Blue Border or launching apps, files, or folders inside or outside of Blue Border after you do so. We’ll connect you with Venn’s support team to ensure any issues are resolved quickly.
Known Issues
The following issues are appearing sporadically.
Users prompted to log in to apps each time they launch them
Some users may be prompted to log back in to work apps each time they open them inside Blue Border.
We recognize that repeated logins can create friction in users' work days, and we are working to resolve this issue as quickly as possible.
Meeting links not opening when logged out of Blue Border
If a user is logged out of Blue Border and clicks a link to join a meeting outside of Blue Border, the meeting may not open. This issue may affect video and voice calling applications (Zoom, Teams, Slack, etc.).
If this is posing a problem for your users, please connect them with Venn's support team so that we can walk them through a short-term workaround until this issue is resolved.