Cannot detect available memory on OSX

[jenniportman]

The detect_available_mem function in the wrapper script uses SC_PHYS_PAGES which is not available on OSX:

>>> import os
>>> os.sysconf('SC_PAGE_SIZE')
4096
>>> os.sysconf('SC_PHYS_PAGES')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: unrecognized configuration name

Problematic line is:

megahit/src/megahit

Line 595 in d97f037

pcount = os.sysconf('SC_PHYS_PAGES')

[voutcn]

It works with newer versions of MacOS. You can still use -m to run it.
For example, if you have 16G memory, you may try -m 15e9.

[jenniportman]

It doesn't work for me on Mojave/2017 Macbook Pro.

I have been using the -m option to run it, but it would be nice to have a fix for this.

[voutcn]

Should have been fixed in https://github.com/voutcn/megahit/releases/tag/v1.2.9