Cockos has updated the Windows version of REAPER to v1.821 and also released a new pre-release alpha version of the Mac OS X version (v0.20).

Changes since v1.819 (Windows version):

• Fixed creeping CPU use when using SoundTouch on stretched items.
• Internal reworking of sink configuration for mac port.
• Added "Cockos" plugin category to FX add dialog.
• Updated layout on most Cockos plugins.
• Missing file box: more selective auto-file-detection based on previous browse for file logic.
• Project setting for record path can now take relative path name.
• Project autosave (to timestamped files) saves to .rpp.bak.
• Project open dialog will now optionally list .rpp.bak (in type list).

Mac OS X Alpha version 0.20 changes (available here):

• MIDI input/output support.
• Included ReaSynth and ReaSyndr VSTs.
• VST fixes.
• Tooltips and cursors in main edit view.
• Transport BPM/selection display.
• Project settings for record format now work.
• Tons of other updates from the Windows side.
• Included the demo project.
• and more...