Brew by default doesn't install unsupported software versions. Like at this time, php7.3 was no longer supported. Installing it disables it and install instead the latest version (8.1.3 at this time). 1~$ brew install php@7.3 2Running `brew update --preinstall`... 3==> Auto-updated Homebrew! 4Updated 2 taps …

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Install 1brew cask install powershell Run 1pwsh To update/upgrade later on: 1brew update 2brew cask upgrade powershell See https://docs.microsoft.com/en-us/powershell/scripting/install/installing-powershell-core-on-macos?view=powershell-7

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