On Sep 26, 2017, at 7:28 AM, Alexandre Torres Porres <porres@gmail.com> wrote:

2017-09-26 2:02 GMT-03:00 Kevin Haywood <khaywood@ucsd.edu>:
Does your install use the new APFS file system, and have you by chance also tested audio file reads/writes with Pd?

I figured all of them did use APFS... how do I check this? I tested it on an old macbook air if that helps... and no, I haven't tested file reads/writes.

I would imagine that Disk Utility would provide some identifying information, but meanwhile it seems that the only drives that don’t get converted to APFS are Apple’s “Fusion Drives,” which are some combination of SSD and rotating platter.