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Bug 4848 - SDL_RENDERER_PRESENTVSYNC does not vsync in 2.0.10 on Mojave?
Summary: SDL_RENDERER_PRESENTVSYNC does not vsync in 2.0.10 on Mojave?
Status: RESOLVED INVALID
Alias: None
Product: SDL
Classification: Unclassified
Component: video (show other bugs)
Version: 2.0.10
Hardware: x86_64 macOS 10.14
: P2 normal
Assignee: Ryan C. Gordon
QA Contact: Sam Lantinga
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-10-29 23:48 UTC by Brad Smith
Modified: 2019-10-30 00:30 UTC (History)
1 user (show)

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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!