X Plane 12 4.3 B3 is out.

Release Date: May 21, 2026

ATC

• The calculation of the estimated radio strength will no longer cause a crash

Graphics Engine

• A warning is now shown at startup if the user has a Raptor Lake CPU with unstable microcode

• Fixed a memory leak when running on macOS

• Implemented various fixes to improve stability

VR

• The G-loaded camera now works again in VR mode (XPD-18131)

• Yoke manipulators will latch/unlatch correctly again (XPD-18142)

• Fixed a camera issue in VR when changing aircraft while using real-world weather (XPD-18082)

• Improved the alignment of Meta Quest 2 and Quest 3 controllers (XPD-18134)

• On Apple Vision Pro, the virtual hand mesh is now hidden when visionOS shows your real arm through passthrough, so you no longer see a virtual hand stacked on top of your real one (XPD-18107)

• Refreshed the VR radial menu with dedicated icons for the MR sub-buttons and adjusted spacing for a consistent layout across all sub-menus

• Hand Tracking, VRS, and Mixed Reality capability warnings in VR Settings now use a clearer, more visible badge style consistent with other warnings on the page

Weather

• Fixed a memory leak in the real-weather downloader

SDK

• XPLMPluginReload will no longer cause a reload loop (XPD-18139)

• Temporarily removed threading checks for XPLMGetNthPlugin, XPLMReloadPlugins, and XPLMIsFeatureEnabled to avoid breaking existing plugins; these checks will be re-enabled in the next major release

https://www.x-plane.com/kb/x-plane-12-4-3-release-notes/