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Bug 4848

Summary: SDL_RENDERER_PRESENTVSYNC does not vsync in 2.0.10 on Mojave?
Product: SDL Reporter: Brad Smith <rainwarrior+libsdl>
Component: videoAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED INVALID QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2 CC: icculus
Version: 2.0.10   
Hardware: x86_64   
OS: macOS 10.14   

Description Brad Smith 2019-10-29 23:48:20 UTC 
Using SDL_RENDERER_PRESENTVSYNC does not appear to do any vsync wait in 2.0.10 + Xcode 10 + Mojave macOS 10.14.1

An old version of my app built with 2.0.8 and XCode 9 runs as expected in the same environment, but the newer version does not vsync at all and ends up using 100% of a CPU core and producing uneven framerate.
Comment 1 Ryan C. Gordon 2019-10-30 00:20:05 UTC 
This is a bug in Mojave; they fixed it after 10.14.1. 10.14.5 is the latest version, please run software update and it should fix the problem.

--ryan.
Comment 2 Brad Smith 2019-10-30 00:30:06 UTC 
Thank you for the explanation!