Issues with tensorflow when installing

Hi I'm trying to install on osx High Sierra with Python3.8.2 but I receive this error:
ERROR: Could not find a version that satisfies the requirement tensorflow==1.15.2
ERROR: No matching distribution found for tensorflow==1.15.2

Do I need to install this specific version or could I install the latest version manually and delete tensorflow==1.15.2 from requirements.txt?

I've tried it but looks that T5 in the version installed with the install script t5-0.1.7 needs :
Requires-Dist: tensorflow-datasets (>=1.3.2)
Requires-Dist: tensorflow-text (==1.15.0rc0)
Requires-Dist: tensorflow (==1.15) ; extra == 'tensorflow'

instead the t5 Version: 0.8.1 looks that is not needing those things.

Could I try to replace the t5 with the 0.8.1?

Thank you in advance