That difference is that I adjust the viewport position so the text at end of the document is displayed in the current visible rect (NSView.visibleRect). thank you, let me summarize the approach: receive an estimated (too big or too small) content height update content size with the estimated height move viewport to the end of that height (either it is final or estimated) layout end of the document there do you think that approach translate well to any location in the middle of the document? What about the scrollview scrollbar that depends on the total content Size and updates as layoutmanager update its size, do you have any trick for that?

in that case what is the meaning of .list and .table options it does not affect the allowed result? It's not clear to me.

The crash is still here with macOS 15.4 RC2 (24E247). Xcode Version 16.2 (16C5032a). For me it crashes when debugger is about to start.

For the record, the final release macOS 15.4 (24E248) and Xcode 16.2 still crashes debugger.

Xcode 16.3 on macOS 15.4 still crashes the debugger. In different situations, but it crashes in the same places. eg. can't debug SwiftUI on iOS simulator.

Still happening in Xcode 26.0 (17A321) RC

Same problem. Reported Sep, 9, still happens to me FB20178568

I still experience this problem with Xcode 26.1 ~ ❯ xcodebuild -downloadComponent MetalToolchain Beginning asset download... 2025-10-28 23:23:43.391 xcodebuild[1151:10353] IDEDownloadableMetalToolchainCoordinator: Failed to remount the Metal Toolchain: The file “com.apple.MobileAsset.MetalToolchain-v17.1.324.0.wLDum9” couldn’t be opened because you don’t have permission to view it. Downloaded asset to: /System/Library/AssetsV2/com_apple_MobileAsset_MetalToolchain/4ab058bc1c53034b8c0a9baca6fba2d2b78bb965.asset/AssetData/Restore/022-17211-415.dmg Done downloading: Metal Toolchain 17A324.

Sure: ❯ xcodebuild -showComponent metalToolchain ; xcrun -f metal ; xcrun metal --version 2025-10-31 19:42:19.179 xcodebuild[11856:231862] IDEDownloadableMetalToolchainCoordinator: Failed to remount the Metal Toolchain: The file “com.apple.MobileAsset.MetalToolchain-v17.1.324.0.Qp6DBA” couldn’t be opened because you don’t have permission to view it. 2025-10-31 19:42:19.414 xcodebuild[11856:231864] IDEDownloadableMetalToolchainCoordinator: Failed to remount the Metal Toolchain: The file “com.apple.MobileAsset.MetalToolchain-v17.1.324.0.Qp6DBA” couldn’t be opened because you don’t have permission to view it. 2025-10-31 19:42:19.417 xcodebuild[11856:231860] IDEDownloadableMetalToolchainCoordinator: Failed to remount the Metal Toolchain: The file “com.apple.MobileAsset.MetalToolchain-v17.1.324.0.Qp6DBA” couldn’t be opened because you don’t have permission to view it. Asset Path: /System/Library/AssetsV2/com_apple_MobileAsset_MetalToolchain/4ab058bc1c53034b8c0a9baca6fba2d2b78bb965.asset/AssetData Build Version: 17A324 Status: installed Toolchain Search Path: /private/var/run/com.apple.security.cryptexd/mnt/com.apple.MobileAsset.MetalToolchain-v17.1.324.0.Qp6DBA /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/metal error: error: cannot execute tool 'metal' due to missing Metal Toolchain; use: xcodebuild -downloadComponent MetalToolchain