Mac M1 installation error

Usage
#1

I recently tried to install OTB 8.0.0 on my M1 Macbook and got the following error:

$ ./OTB-8.0.0-Darwin64.run --target /Applications/OTB-8.0.0-Darwin64  
Creating directory /Applications/OTB-8.0.0-Darwin64
Verifying archive integrity...  100%   All good.
Uncompressing OrfeoToolBox 8.0.0  100%  
*****Warning******
OTB python bindings normally require python3.5.
The version of OTB_PYTHON_EXE (/Users/ashnair/miniconda3/bin/python3) is                   3.8.12.
This case is undefined unless you are sure the packages were                   build with this version of python.
OTB python bindings will be configured for /Users/ashnair/miniconda3/bin/python3                     ( version: 3.8.12 )
Found python library: /opt/local/lib/libpython3.8.dylib
Configuring...
Installing uninstall script for OTB 'tools/uninstall_otb.sh'

source './otbenv.profile' file to set required environment variables
eg: '. /Applications/OTB-8.0.0-Darwin64/otbenv.profile'
You can also copy above line to  ~/.profile to keep changes permanently!
More documentation can be found in /Applications/OTB-8.0.0-Darwin64/README

$ python -c "import otbApplication"

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/Applications/OTB-8.0.0-Darwin64/lib/python/otbApplication.py", line 15, in <module>
    import _otbApplication
ImportError: dlopen(/Applications/OTB-8.0.0-Darwin64/lib/python/_otbApplication.so, 0x0002): tried: '/Applications/OTB-8.0.0-Darwin64/lib/python/_otbApplication.so' (mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64e')), '/usr/local/lib/_otbApplication.so' (no such file), '/usr/lib/_otbApplication.so' (no such file)

I’m guessing this might be because otb wasn’t compiled to work with M1. Is there a solution for this?

#2

Hi,

We currently compile OTB only on intel Macs (that’s why there is the Darwin64 suffix), you are right we never have tried to compile it on M1 as there are a lot of dependencies and some of them are not ported to M1 yet. I think that Rosetta which translates x86_64 instructions to ARM64 can do the job with OTB but I don’t think that python also has this Rosetta interface. The solution will be available in a couple of days : an official docker image.

We will announce it on the forum and on the website. As we don’t have an M1 mac, tests will be greatly appreciated

Best regards

#3

Dear @ashnair1,

Two docker images a available now. You can read more about this here.

Sincerely.
Julien :slight_smile:

1 Like
#4

Thanks a lot Julien.

Funnily enough I ended up building docker images as well. The following repo contains images for all versions from 7.0.0 to 8.0.0 and uses github actions to build them.

1 Like