pyferret issue with anaconda install, MacOS, Apple silicon

[andyjacobson]

New M3 Mac running MacOS 14.7.1. Followed installation instructions in the README.md file, notably doing:

CONDA_SUBDIR=osx-64 conda create -n FERRET -c conda-forge pyferret ferret_datasets --yes

This apparently installed OK, but executing ferret in this environment yields:

A module that was compiled using NumPy 1.x cannot be run in
NumPy 2.2.3 as it may crash. To support both 1.x and 2.x
versions of NumPy, modules must be compiled with NumPy 2.0.
Some module may need to rebuild instead e.g. with 'pybind11>=2.12'.

If you are a user of the module, the easiest solution will be to
downgrade to 'numpy<2' or try to upgrade the affected module.
We expect that some modules will need time to support NumPy 2.

Traceback (most recent call last): File "", line 1, in
File "/opt/anaconda3/envs/FERRET/lib/python3.10/site-packages/pyferret/init.py", line 468, in init
if not start(memsize=my_memsize, journal=my_journal, verify=my_verify,
File "/opt/anaconda3/envs/FERRET/lib/python3.10/site-packages/pyferret/init.py", line 589, in start
if not libpyferret._start(flt_memsize, False, False,
AttributeError: _ARRAY_API not found
Traceback (most recent call last):
File "", line 1, in
File "/opt/anaconda3/envs/FERRET/lib/python3.10/site-packages/pyferret/init.py", line 468, in init
if not start(memsize=my_memsize, journal=my_journal, verify=my_verify,
File "/opt/anaconda3/envs/FERRET/lib/python3.10/site-packages/pyferret/init.py", line 589, in start
if not libpyferret._start(flt_memsize, False, False,
ImportError: numpy.core.multiarray failed to import

Tried the suggested "conda install 'numpy<2'", which also completed without error. However, the resulting ferret apparently cannot create a graphical window:

NOAA/PMEL TMAP
PyFerret v7.64 (optimized)
Darwin 19.6.0 - 12/10/21
20-Feb-25 16:20

yes? set win/new
grdelWindowCreate: error when calling createWindow in pyferret.graphbind: PY_SSIZE_T_CLEAN macro must be defined for '#' formats
FGD_GACWK: null windowobj
FGD_GSCR: null windowobj
FGD_GSCR: null windowobj
FGD_GSCR: null windowobj
FGD_GSCR: null windowobj
FGD_GSCR: null windowobj
FGD_GSCR: null windowobj
FGD_GSPLR: null windowobj
... and many more such messages until
FGD_GSPLR: null windowobj
FGD_GQDSP: null windowobj
**ERROR: value out of legal range: The implied size in pixels is too small

I sure would like to use ferret on my Mac! Any suggestions out there?

Best, Andy Jacobson

[underwoo]

This is an issue on Linux systems as well. We found that pinning numpy=1 when you install pyferret works on Linux. I haven't verified that it will also work on a Mac.

[pera-noaa]

Just pinning numpy didn't work for me, but by also pinning python=3.9 I was able to get it working on mac.

CONDA_SUBDIR=osx-64 conda create -n ferret -c conda-forge numpy=1 python=3.9 pyferret ferret_datasets --yes

[pradalma]

Hi, brand new MacBook Pro user (I have successfully installed ferret in the past on other systems). I am on sequoia 15.3.1 with homebrew installed for the M4 chip. I followed the latest README and ran CONDA_SUBDIR=osx-64 conda create -n FERRETm4 -c conda-forge pyferret ferret_datasets --yes
It seems to install ferret fine. I then run >conda activate FERRETm4, but when I try to execute ferret I get the following error:
/opt/homebrew/Caskroom/miniconda/base/envs/Ferretm4/bin/ferret: line 17: /opt/homebrew/Caskroom/miniconda/base/envs/Ferretm4/bin/python: Bad CPU type in executable

I have searched for possible fixes to no avail so far. Any help would be greatly appreciated!!!
Thanks
Marie-Aude

[RuiWangPU]

Hi all, I am trying to install ferret on my mac (M2, Sequoia 15.6.1). I was able to install with the following commands:
CONDA_SUBDIR=osx-64 conda create -n ferret -c conda-forge numpy=1 python=3.9 pyferret ferret_datasets --yes

but when I tried to plot, I got the following errors:

yes? plot ffire[I=1,j=1]
At line 95 of file getsym.F
Fortran runtime error: Missing comma between descriptors
(I2.2, ':', I2.2 ':', I2.2)

Any suggestions?