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OPENGL 4.3 HIGH SIERRA MAC OS MACI suffer from the same issue, screen flickering, Mac lagging and non-responsive KSP. Just want to say that -force-opengl works for me too. I'm willing to help with testing things if needed. Since -force-opengl works around the problem for me (and I don't usually play KSP on my MacBook anyway), I'm sticking with High Sierra. (The only other differences seem to be related to timing, e.g. +RT Formats: ARGB32, Depth, ARGBHalf, Shadowmap, RGB565, ARGB4444, ARGB1555, Default, ARGB2101010, DefaultHDR, ARGBFloat, RGFloat, RGHalf, RFloat, RHalf, R8 ![]() RT Formats: ARGB32, Depth, ARGBHalf, Shadowmap, RGB565, ARGB4444, ARGB1555, Default, ARGB2101010, DefaultHDR, ARGBFloat, RGFloat, RGHalf, RFloat, RHalf, R8, ARGBInt, RGInt, RInt, RGB111110Float GPU: Intel(R) Iris(TM) Graphics 550 (1536MB) I compared the two KSP.log files (new and legacy OpenGL backend) with diff, and this is the only difference that looks relevant: I can provide KSP.log files using both Unity's default OpenGL backend (which stutters in High Sierra) and its legacy one with -force-opengl (which runs smoothly). This is speculation on my part, you mentioned capturing diagnostic info to help investigate, but where should that info be posted? Here in the thread, or somewhere else? The system report is a 4.3MB XML file, and KSP.log is 248k even without mods. aglSwapBuffers() or glSwapAPPLE() or whatever), and how the macOS WindowServer handles that request. There may be something different in how Unity's old and new OpenGL backends request page flipping (e.g. The stuttering looks like something going wrong with page-flipping, and I suspect problem is in the interaction between OpenGL (which KSP uses to draw its own window) and Apple's Metal API (which macOS now uses to paint KSP's window onto the screen whenever it changes). I doubt APFS is the problem, since KSP loads all its data at startup and shouldn't be interacting with the filesystem on a frame-by-frame basis. OPENGL 4.3 HIGH SIERRA MAC OS PROI've tested with the Steam version of KSP 1.3.0, on a 2016 13" MacBook Pro with Touch Bar and Iris GPU. However, -force-opengl (which tells Unity to use its legacy OpenGL backend) seems to resolve the problem - no stuttering, even when running the game from an APFS partition. I've tried both -force-glcore and running from an HFS+ partition, and neither helps. And the log file is KSP.log located in your KSP installation folder. Click the Apple logo on the top left, select About This Mac, click the System Report button and hit cmd+S to obtain the system specs. You can also help us investigate the issue by posting here your computer specs and log files from when KSP is malfunctioning on High Sierra. We know that these provisional solutions don't work/apply to everyone, but that's currently all we have found out. If you have a recent Time Machine backup from before you installed High Sierra, you can roll back your installation to Sierra (or whatever macOS version you had before). OPENGL 4.3 HIGH SIERRA MAC OS MAC OSCreate a partition on your hard drive that uses the Mac OS Extended (Journaled) file system, move KSP to a directory on that partition and run it from there. ![]() ![]() OPENGL 4.3 HIGH SIERRA MAC OS DOWNLOADFor the KSP Store version you can download the shortcut with the argument already set from here. If you need instructions for the GOG version, please let us know. Run KSP with the -force-opengl argument, here is how you can set the argument on Steam. If you have already updated to High Sierra there are a couple recommendations that could help you: If you have not updated your computer to High Sierra and none of the new features are essential for your day-to-day workflow, we strongly suggest you wait for it and stay on Sierra for now. There have been reports of KSP as well as other games presenting issues that render them unplayable. ![]() As some of you may know Apple just released the latest stable version of macOS a few weeks ago, 10.13 High Sierra. ![]()
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