ERROR: Could not find a version that satisfies the requirement tensorflow-gpu==1.15.0 code example

Example 1: ERROR: Could not find a version that satisfies the requirement tensorflow (from versions: none) ERROR: No matching distribution found for tensorflow

in the terminal paste this
this will surely work

pip3 install --upgrade https://storage.googleapis.com/tensorflow/mac/cpu/tensorflow-1.0.0-py3-none-any.whl

Example 2: Could not find a version that satisfies the requirement tensorflow (from versions: none)

pip3 install --upgrade https://storage.googleapis.com/tensorflow/mac/cpu/tensorflow-1.0.0-py3-none-any.whl