Vember Audio has released a beta of version 1.5.1 of Surge for Mac OS X AU.

Fixes:

• The step-sequencer couldn't retrigger envelopes when the modulation output of LFO1 wasn't used.
• When importing wavetables using wav-files they can now be up to 1024 samples long.
• Wide filterblock mode didn't work on PowerPC.
• Several filter models were broken on PowerPC.