The Mac screen coordinate system is inverted on the y-axis compared to JavaFX so glass needs to flip the y coordinate. IM coordinates are relative to the primary screen which is NSScreen.screens[0], not NSScreen.mainScreen (mainScreen is the screen that contains the window that has focus).
------------- Commit messages: - Correctly invert y-coordinate on secondary monitors Changes: https://git.openjdk.org/jfx/pull/1313/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1313&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8301893 Stats: 4 lines in 1 file changed: 2 ins; 0 del; 2 mod Patch: https://git.openjdk.org/jfx/pull/1313.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1313/head:pull/1313 PR: https://git.openjdk.org/jfx/pull/1313