Analogue-sequencer

> I tried but those programs are not for mac.. Also I tried 
> that sysex 55 
> string but can´t find a similar midi ox for mac

If you can find a sysex utility for the Mac that will let you send the syx
file with a second or so delay between each block you should have plenty
time to see if there is a flash write error or checksum error at a
particular block.
Failing that, you can send the CPU back to me and I'll test it here.

Best regards,
Colin Fraser
Sequentix Music Systems Ltd
http://www.sequentix.com