Unable to install ray 1.9.0 on MacOS

Ray Core
1

I get the following error when trying to install ray 1.9.0 with pip install ray==1.9.0 on MacOS 10.14.5.

ERROR: Could not find a version that satisfies the requirement ray==1.9.0 (from versions: 0.6.0, 0.6.1, 0.6.2, 0.6.3, 0.6.4, 0.6.5, 0.6.6, 0.7.0, 0.7.1, 0.7.2, 0.7.3, 0.7.4, 0.7.5, 0.7.6, 0.7.7, 0.8.0, 0.8.1, 0.8.2, 0.8.3, 0.8.4, 0.8.5, 0.8.6, 0.8.7, 1.0.0rc0, 1.0.0rc1, 1.0.0rc2, 1.0.0, 1.0.1, 1.0.1.post1, 1.1.0, 1.2.0, 1.3.0, 1.4.0rc1, 1.4.0rc2, 1.4.0, 1.4.1, 1.5.0, 1.5.1, 1.5.2)
ERROR: No matching distribution found for ray==1.9.0

Does anyone know what the problem is?

2

Hmm looks like a pip cache issue? especially this line:

ERROR: Could not find a version that satisfies the requirement ray==1.9.0 (from versions: 0.6.0, 0.6.1, 0.6.2, 0.6.3, 0.6.4, 0.6.5, 0.6.6, 0.7.0, 0.7.1, 0.7.2, 0.7.3, 0.7.4, 0.7.5, 0.7.6, 0.7.7, 0.8.0, 0.8.1, 0.8.2, 0.8.3, 0.8.4, 0.8.5, 0.8.6, 0.8.7, 1.0.0rc0, 1.0.0rc1, 1.0.0rc2, 1.0.0, 1.0.1, 1.0.1.post1, 1.1.0, 1.2.0, 1.3.0, 1.4.0rc1, 1.4.0rc2, 1.4.0, 1.4.1, 1.5.0, 1.5.1, 1.5.2)