Re: [ferret_users] pyferret on macOS: successful installation

[Karl Smith - NOAA Affiliate <karl.smith@xxxxxxxx>]

Hi Ryo,

Thank you for this excellent news!  I had recently seen that multiple windows were now working with the latest High Sierra/Python/PyQt/Qt on a couple of Mac systems, but I am glad to get confirmation from others.  I am not sure what updates got around the program freezing/crashing when attempting to display a second window (the previous behavior).  

I do not have access to any Mac OS X Sierra systems, so if anyone has very recent experience with this older Mac OS X version and can report, I would be very grateful.  (Previous behavior under OS X Sierra was the program freezing/crashing when attempting to display even the first window.)

The error message is generated by OS X or Python.  ("Metal" is the graphics framework that Apple has been using to replace OpenGL.)  This is why we have not been able to do much about this issue with Mac OS X Sierra and High Sierra.

Best regards,

Karl

On Sun, Aug 5, 2018 at 4:58 AM, Ryo Furue <furue@xxxxxxxxxx> wrote:

Ferret-Mac users,

I've just installed pyferret on my macOS High Sierra machine and it's working. So, I briefly describe the steps I took.

0.1) Install homebrew.

0.2) Install python via homebrew. (I didn't manually do it but a lot of homebrew packages depend on python, so a few versions of python had already been installed.)

1) Install the packages "numpy" and "pyqt" via homebrew.

2) Determine the version of the standard python homebrew installed:

$ /usr/local/bin/python --version

Mine is python 2.7 .  There are two versions of PyFerret binary, one is compiled for python 2.7 and the other for python 3.7 .  If your python version isn't neither 2.7 nor 3.7, perhaps you want to install one or the other.  Non-default versions will be installed as /usr/local/bin/python3.7 for example.

3) Install pyferret exactly as described in the official guide https://ferret.pmel.noaa.gov/Ferret/downloads/ferret-installation-and-update-guide . (I just poured the contents of the .tar.gz file under /usr/local/pyferret-7.4.2-Python-2.7/ and set paths using Finstall .) The install script will ask you which python executable it should use. Use the version determined above.

That's all.

Each time I invoke pyferret, I get this message

2018-08-05 20:48:39.881 Python[7726:505144] Metal pipeline state creation failed with error: Error Domain=MTLLibraryErrorDomain Code=3 "Compiler encountered an internal error" UserInfo={NSLocalizedDescription=Compiler encountered an internal error}

but I don't know what impacts it has.

Hope this is helpful to Mac users.

Cheers,

Ryo

--

Karl M. Smith, Ph.D.
JISAO Univ. Wash. and PMEL NOAA
"The contents of this message are mine personally and do
not necessarily reflect any position of the Government
or the National Oceanic and Atmospheric Administration."