[BUG] psutil cannot be installed on MacOS Big Sur beta

[Laszlo Pal]

Describe the bug

When trying to install bashtop on MacOS Big Sur, one of the requirement psutil cannot be installed

To Reproduce

pip3 install psutil

Expected behavior

psutil installed

Screenshots

[If applicable, add screenshots to help explain your problem.]

Info (please complete the following information):

• Bashtop version:
  commit 4bf71e6 (HEAD -> master, origin/master, origin/HEAD)
  Merge: e7648ff 2725b77
  Author: aristocratos [e-mail]
  Date: Mon Aug 10 18:05:06 2020 +0200

  Merge pull request #181 from lwhsu/freebsd

  Update FreeBSD install instructions

• Psutil version: python3 -c "import psutil; print(psutil.version_info)" (version 5.7.0 or above is required):
  n/a, psutil cannot be installed

• (OSX/FreeBSD) Os release version:
  20A5354i, Big Sur

• Terminal used:
  iterm

• Font used:
  powerline

• Bash version, bash --version (version 4.4 or above is required):
  5.0.18(1)-release (x86_64-apple-darwin19.5.0)

• Locales: output of locale -v
  locale Tue Sep 1 09:47:41 2020
  LANG="en_US.UTF-8"
  LC_COLLATE="en_US.UTF-8"
  LC_CTYPE="en_US.UTF-8"
  LC_MESSAGES="en_US.UTF-8"
  LC_MONETARY="en_US.UTF-8"
  LC_NUMERIC="en_US.UTF-8"
  LC_TIME="en_US.UTF-8"
  LC_ALL="en_US.UTF-8"

[Laszlo Pal]

It seems after installing latest xcode-beta and the command line tools, it is fine. It is a great stuff :) Thank you