I was able to install tensorflow-macos and tensrflow-metal on intel based iMac
$ python3 -m venv tensorflow-metal-test
$ source tensorflow-metal-test/bin/activate
$ cd tensorflow-metal-test/
$ python -m pip install -U pip
$ pip install tensorflow-macos
$ pip install tensorflow-metal
and my version
$ python -V
Python 3.8.2
$ pip -V
pip 21.1.2 from /Us...
$ pip list
Package Version
----------------------- -------------------
absl-py 0.13.0
astunparse 1.6.3
cachetools 4.2.2
certifi 2021.5.30
chardet 4.0.0
flatbuffers 1.12
gast 0.4.0
google-auth 1.32.0
google-auth-oauthlib 0.4.4
google-pasta 0.2.0
grpcio 1.34.1
h5py 3.1.0
idna 2.10
keras-nightly 2.5.0.dev2021032900
Keras-Preprocessing 1.1.2
Markdown 3.3.4
numpy 1.19.5
oauthlib 3.1.1
opt-einsum 3.3.0
pip 21.1.2
protobuf 3.17.3
pyasn1 0.4.8
pyasn1-modules 0.2.8
requests 2.25.1
requests-oauthlib 1.3.0
rsa 4.7.2
setuptools 41.2.0
six 1.15.0
tensorboard 2.5.0
tensorboard-data-server 0.6.1
tensorboard-plugin-wit 1.8.0
tensorflow-estimator 2.5.0
tensorflow-macos 2.5.0
tensorflow-metal 0.1.1
termcolor 1.1.0
typing-extensions 3.7.4.3
urllib3 1.26.6
Werkzeug 2.0.1
wheel 0.36.2
wrapt 1.12.1