- codesigned and notarized MacOS release

FTM:
- allow loading of Spear SDIF files
- fix in ftm.sdif.info
- other minor bug fixes

Gabor:
- adapt to changes in audio data structures from Max 8.1.6 on Mac
- fixed crash in gabor.psolastic example, related to ftm.record
- protect from rare case of extreme system load