Cannot install DRP on Mac osx-arm64

[palfeng]

Hello, I tried to install DRP on my new Mac following https://keck-datareductionpipelines.github.io/MosfireDRP/installing/#installing-python. I tried "conda create --no-default-packages -c astropy -n mospy python=3.6.3 astropy=2.0.3 ccdproc=1.3.0 ipython=6.2.1 numpy=1.13.3 scipy=1.0.0 PyQt=5.6.0" then I got the errors:

Channels:

• astropy
• defaults
  Platform: osx-arm64
  Collecting package metadata (repodata.json): done
  Solving environment: failed

LibMambaUnsatisfiableError: Encountered problems while solving:

• nothing provides requested astropy 2.0.3**
• nothing provides requested ipython 6.2.1**
• nothing provides requested numpy 1.13.3**
• nothing provides requested pyqt 5.6.0**
• nothing provides requested python 3.6.3**
• nothing provides requested scipy 1.0.0**
• nothing provides python >=3.9,<3.10.0a0 *_cpython needed by astroscrappy-1.1.0-py39h7b9fbcb_0

Could not solve for environment specs
The following packages are incompatible
├─ astropy 2.0.3** does not exist (perhaps a typo or a missing channel);
├─ ccdproc 1.3.0** is not installable because it requires
│ └─ astroscrappy but there are no viable options
│ ├─ astroscrappy 1.1.0 would require
│ │ └─ python >=3.9,<3.10.0a0 _cpython, which does not exist (perhaps a missing channel);
│ ├─ astroscrappy 1.1.0 would require
│ │ └─ python >=3.10,<3.11.0a0 _cpython, which does not exist (perhaps a missing channel);
│ └─ astroscrappy 1.1.0 would require
│ └─ python >=3.8,<3.9.0a0 _cpython, which does not exist (perhaps a missing channel);
├─ ipython 6.2.1 does not exist (perhaps a typo or a missing channel);
├─ numpy 1.13.3* does not exist (perhaps a typo or a missing channel);
├─ pyqt 5.6.0** does not exist (perhaps a typo or a missing channel);
├─ python 3.6.3** does not exist (perhaps a typo or a missing channel);
└─ scipy 1.0.0** does not exist (perhaps a typo or a missing channel).

It shows many packages not found. Is it due to a missing channel? Thanks in advance for your help!

[joshwalawender]

Can you try creating the environment from the mospy.yaml file (conda env create -f mospy.yaml)?

Also, just so you know, we are winding down support of this DRP in favor of PypeIt. PypeIt has much more active development and support and has superior sky subtraction algorithms.

[monodera]

As far as I know, the minimum Python version that natively supports osx-arm64 (Apple Silicon) is 3.8 (and any prior versions are already end-of-life), so you may need to tweak the mospy.yaml file to satisfy the dependencies (I don't remember if I have ever managed to make it or not).

[palfeng]

Thanks Josh and monodera! Let me check Pypeit first.