Cannot install rasa_core ( version = 0.11.1)

[medelmaimouni]

When I try to install rasa_core(0.11.1), I get this error
ERROR: Could not find a version that satisfies the requirement tensorflow<1.10,>=1.8 (from rasa_core==0.11.1) (from versions: 2.2.0rc3, 2.2.0rc4, 2.2.0, 2.2.1, 2.3.0rc0, 2.3.0rc1, 2.3.0rc2, 2.3.0, 2.3.1, 2.4.0rc0) ERROR: No matching distribution found for tensorflow<1.10,>=1.8 (from rasa_core==0.11.1)

Furthermore, I tried to work with the latest version of rasa. I get multiple errors ( KerasPolicy is no longer supported for example)

My configuration is:
Mac OS Catalina 10.15.6 Python version: 3.8.6

[sumit12dec]

Are you using the same version of rasa variants mentioned in the book?

[medelmaimouni]

Could you suggest to me a method to install rasa ( other that pip install rasa_core==0.11.1 ), because when i try to install it with pip it shows me that it requires tensorflow 1.8, and my pip could not find a distribution for tensorflow 1.8