Oh dear; I'm afraid your new .p file doesn't seem to load either. I've tried it in ZXSP, Clock Signal and SZ81, and in all cases it just locks them up. I'm afraid that none of the Mac-based emulators may be capable of actually saving software from an emulated ZX81. It may be necessary for you to use something like EightyOne for Windows, running it under a Windows virtual machine or WINE solution (such as CrossOver).