Here are the detailed steps to install and use PowerShell on macOS

Prerequisites: - macOS 10.13 or later - Homebrew package manager
1. Install Homebrew if you don't already have it:
``` /bin/bash -c "$(curl -fsSL" ```
2. Install PowerShell using Homebrew:
``` brew install --cask powershell ```
3. Verify the installation:
``` pwsh ```
This will launch the PowerShell prompt if installed correctly.
Upgrading PowerShell:
1. Update Homebrew's formulae:
``` brew update ```
2. Upgrade PowerShell:
``` brew upgrade powershell --cask ```
3. Relaunch PowerShell for changes to take effect.
- Launch PowerShell by typing `pwsh` in Terminal.
- Run PowerShell commands and scripts. For example:
``` Get-Process Write-Output "Hello World" ./myscript.ps1 ```
- Access help and documentation:
``` Get-Help Get-Command ```
- Install modules from the PowerShell Gallery:
``` Install-Module Azure Import-Module Azure ```
- Access built-in cmdlets like Get-Process, Set-Location, Get-ChildItem etc.
- Use PowerShell providers like Registry, Certificate, FileSystem etc.
- Leverage piping, objects and .NET access in PowerShell scripts.
So in summary, PowerShell on macOS provides access to the same powerful automation and scripting capabilities as on Windows, with a few easy installation steps.
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