macOS Sequoia 15.6 Beta 1 - Bug fixes, changes, and more

[WilliApple]

Release Date ― June 16, 2026
Build Number ― Pending
Apple Silicon System Firmware Version ― Pending
T2 BridgeOS System Firmware Version ― Pending

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New Features & Changes (Found something new? Please press "Edit" on the bottom of this post and add it here)
Resolved Issues
New Issues
(If you are encountering any issues, please press "Edit" on the bottom of this post and add it here)

Known Issues
"Finder and Apple Configurator are unable to successfully restore some Macs in DFU mode. (153476458)
Workaround: Restore the host to a version of macOS that is currently available."

Remaining Issues
Untested Issues

• Alarms may not play when your display is asleep for a long period of time (FB10086690)
  • Workaround: Make your display not fall asleep in Settings > Lock Screen > Turn display off on ____ when inactive. You can turn your brightness off.
  • Issue present since macOS 13.0

Additional Notes

• Please know, Memory Management has always been an issue on any OS (not just Apple's). If you believe there is a Memory Leak, please go to the Apple Menu > Restart > Restart to fix it.
• When a new macOS release comes out, all issues automatically go to "Untested Issues" until they are moved by someone. Issues that stay in Untested for 3 releases (beta or smooth) will be removed from all future threads. When there is a new macOS release, please be sure to let us know about the issue's status by moving it to either "Remaining Issues" or "Resolved Issues"
• macOS 15 Sequoia will be installed via a Delta Update in System Settings. Please be aware about this and the update won’t install with an installer.
• macOS 15 is officially supported on the following devices. If your device is not listed below, it has unfortunately been dropped by Apple. Any efforts of trying to get your Mac running macOS 15, including bugs should be discussed in this thread.
  • MacBook Air: Intel 2020, M1, M2, M3, M4
  • MacBook Pro: 2018, 2019, Intel 2020, M1, M1 Pro/M1 Max, M2, M2 Pro/M2 Max, M3/M3 Pro/M3 Max, M4/M4 Pro/M4 Max
  • Mac mini: 2018, M1, M2/M2 Pro, M4/M4 Pro
  • iMac: Pro 2017, 4K 2019, 5K 2019, 5K 2020, M1, M3, M4
  • Mac Pro: 2019, M2 Ultra
  • Mac Studio: M1 Max/Ultra, M2 Max/Ultra, M3 Ultra, M4 Max
• macOS Sequoia 15.6 Release Notes
• macOS Sequoia Overview
• macOS 15 Release Notes
• Apple Security Updates
• Become an Apple Beta Tester
• Full Installer (App Store) (Pending)
• Full Installer (Direct Download) (Pending)

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Feel free to add in any issues or new features that you have spotted in this release by clicking the "Edit" button below.

 

[Dilan Apple IT]

Resolved Issues in macOS 15.6 Beta
• The softwareupdate —fetch-full-installer command completes
successfully.
• Mac computers no longer fail to obtain an IP address through DHCP when using a
transparent proxy network extension.
• Setup Assistant no longer fails to complete when the user attempts to migrate data from
a computer or backup and device management skips both Terms and Conditions and
data migration.
• Audio from the built-in microphone is no longer silent or distorted after waking from
sleep.
• Resolves an issue where battery life depletes unexpectedly while asleep.
• Resolves an issue where Mac computers may boot to Recovery after installing a
software update.
• Platform SSO enrollment no longer fails when an associated domains configuration is
required.
• The authentication timeout is increased when manually entering 802.1X credentials.

 

[adrianlondon]

Resolved Issues in macOS 15.6 Beta
• The softwareupdate —fetch-full-installer command completes
successfully.
• Mac computers no longer fail to obtain an IP address through DHCP when using a
transparent proxy network extension.
• Setup Assistant no longer fails to complete when the user attempts to migrate data from
a computer or backup and device management skips both Terms and Conditions and
data migration.
• Audio from the built-in microphone is no longer silent or distorted after waking from
sleep.
• Resolves an issue where battery life depletes unexpectedly while asleep.
• Resolves an issue where Mac computers may boot to Recovery after installing a
software update.
• Platform SSO enrollment no longer fails when an associated domains configuration is
required.
• The authentication timeout is increased when manually entering 802.1X credentials.

Where did you get this from? The Feedback Assistant app's release notes are useless.

 

[Dilan Apple IT]

Where did you get this from? The Feedback Assistant app's release notes are useless.

I get these official release notes from the Apple beta portal. ta.apple.com/forit