We're working on an Endpoint Security extension and using Swift 6 with Concurrency. I've heard there are some subtleties to getting the threading right across those two domains and am hoping that someone can help shed light on it. In particular, ES events can be delivered on a high priority thread and I'd like to be sure that any work done in the Concurrency domain retains that priority to minimize latency between event delivery and response.

Filed a feedback on this: FB23038153 I am unable to install a new Sequoia 15.6.1 (latest available .ipsw) on a Tahoe 26.5.1 host using a Virtualization.framework-based VM app. I’ve tried both Tart and VirtualBuddy. Both get to 90% of the installation, then fail with this error: Error Domain=VZErrorDomain Code=10007 "Installation failed." UserInfo={NSLocalizedFailure=An error occurred during installation., NSLocalizedFailureReason=Installation failed., NSUnderlyingError=0xc2ac2e280 {Error Domain=com.apple.MobileDevice.MobileRestore Code=-1 "AMRestorePerformRestoreModeRestoreWithError failed with error: 11" UserInfo={NSLocalizedDescription=AMRestorePerformRestoreModeRestoreWithError failed with error: 11, NSLocalizedFailureReason=An unknown error occurred during installation.}}} I have tried re-installing MobileDevice.pkg from both Xcode 27 beta 1 and Xcode 26.5.0. I’ve rebooted my Mac. I get the same result each time. I’ve also tried using an older Sequoia restore image (15.4.1), same result. Installing a Tahoe guest works fine.

I'm working on a custom instrument that displays intervals from os_signpost data. I'd like to color the intervals in the graph based on data from an accompanying aggregate. For example, color the interval red if its duration is greater than 3 standard deviations from the mean. Is this possible?