The release of FS-UAE 2.6.1 Improvements over version 2.4.x include:
Updated emulation code from WinUAE 3.1.0.
Support for PPC emulation (can run AmigaOS 4.x) via QEMU-UAE plugin.
More emulated hardware support (Toccata, A2061, Picasso IV, …).
Better support for modern OS versions due to using SDL 2.0.
Built-in support for multiple displays, and fixes for HiDPI displays.
The Launcher supports modern OS versions better due to using QT 5.x.
Much improved FS-UAE Launcher user interface.
FS-UAE mouse integration (Workbench cursor follows host cursor).
Updated internal kickstart replacement from AROS.
Dual joystick/mouse mode for joystick port 0.
Official builds for SteamOS (Linux + Steam runtime).
OS X apps are now digitally signed (Apple Developer ID).
Support for JIT direct memory access (much faster JIT).
More gamepads are recognized out of the box.
Many bug fixes.
… and a lot of other improvements. See the ChangeLog entries for full details.
http://eab.abime.net/showthread.php?t=79764