fs-uae has released a new development version of its amiga emulator fs-uae

New option floppy_drive_volume_empty.
Switched default key mapping for host backslash and insert keys.
Use GLEW instead of GLee for OpenGL extensions.
When not using FS-UAE Launcher, model A1200 defaulted to kickstart 3.0.
Changes in FS-UAE Launcher 2.5.34dev:

Changed tab panel appearance on OS X to match other platforms.
Renamed language prefs to appearance prefs, added launcher theme option.
Close login dialog before opening database refresh dialog.
Settings UI for specifying empty floppy drive volume (or disabling it).
Added keyboard settings to configure equals/insert/backslash/less mapping.
Added support for WHDLoad 18.1, set as default version.
Replaced some icons, added new rom/ram icon.
Fixed an issue with the new CPU selection.

source http://fs-uae.net/blog