When disabling the opacity slider of color panels, my app crashes with unsatisfiable layout constraints. Feel free reproduce with a minimal test project: A macOS app based on the Xcode 26.0 template with only one line added to the ViewController's viewDidLoad() function: NSColorPanel.shared.showsAlpha = false The issue doesn't occur if this property is set to "true" or not set at all. I just filed a corresponding bug report (FB20269686), although I don't expect any feedback from Apple ... as numerous issues I reported were never updated or commented at all (after migrating from RADARs).

macOS 26 "Tahoe" is allocating much more memory for apps than former macOS versions: A customer contacted me with my app's Thumbnail extension allocating so much memory that her 48 GB RAM Mac Mini ran into "out of application memory" state. I couldn't identify any memory leak in my extension's code nor reproduce the issue, but found the main app allocating as much as 5 times the memory compared to running on macOS 15 or lower. This productive app is explicitly using "Liquid Glass" views as well as implicitly e.g. for an inspector pane. So I created a sample app, just based on Xcode's template of a document-based app, and the issue is still showing (although less dramatically): This sample app allocates 22 MB according to Tahoe's Activity Monitor, while Sequoia only requires 16 MB: macOS 15.6.1 macOS 26.2 Is anyone experiencing similar issues? I suspect some massive leak in Tahoe's memory management, and just filed a corresponding feedback (FB21967167).

Hi folks,My Quick Look plugin reads a "related item" in addition to the file to be thumbnailed / previewed. Therefore I implement a NSFilePresenter as described in scenario 2 of the link Apple documentations:https://developer.apple.com/library/archive/documentation/Security/Conceptual/AppSandboxDesignGuide/AppSandboxInDepth/AppSandboxInDepth.html#//apple_ref/doc/uid/TP40011183-CH3-SW22This approach worked well until macOS 10.15 "Catalina" (and even works there for the main app). When previewing a file with Quick Look the related item file is not read. I assume the sandbox of Quick Look is not extended to the related item.Before filing a RADAR, does anyone has a similar QL plugin and observing the same behavior?Greetings, MattesEdit: If I perform the preview using qlmanage the related item is read...

For all my iOS projects only simulators running iOS 16.4 are listed as Run Destinations ... although I've installed the iOS 13 simulator and corresponding entries are listed under "Devices & Simulators". I've toggled "Show run destination" from "Automatic" to "Always" with no avail. Deployment target is e.g. iOS 13, and I'm running Xcode Version 14.3 (14E222b) on a 14" MBP with Apple Silicon. As a current bypass I'm booting up the simulator manually and install apps by "xcrun simctl install booted APP.app" to allow some basic testing, but that's no sustainable solution. Any help is much appreciated! Mattes

After updating Safari to version 15.0 (16612.1.29.41.4, 16612), App Store Connect refuses to load "Sales & Trends". Other tabs like "My Apps" are loaded properly and Firefox has no issues showing my trends, but Safari is just presenting a blank page (titlebar only, no navigation, no charts). Apple, what a shame that Safari cannot render even your own web sites... Mattes