Gearsystem, an open-source emulator for the Sega Master System, Game Gear, and SG-1000, has been released in version 3.9.24.

The new version brings improved vsync on high refresh rate displays and smoother audio rate control. It follows shortly after version 3.9.23.

• Improved vsync on high refresh rate displays
• Smoother audio rate control
• Remember last folder in file dialogs
• Updated Game Controller DB
• Bug fixes and improvements

Source: GitHub