PuTTY is not available for Mac but there are some alternatives that runs on macOS with similar functionality. The best Mac Shell alternative is Tabby, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to PuTTY and nine of them are Shells available for Mac so hopefully you can find a suitable replacement. Other interesting Mac Shell alternatives to PuTTY are PowerShell, ZOC, WindTerm and Terminal.
Tabby is an infinitely customizable cross-platform terminal app for local shells, serial, SSH and Telnet connections.
Almost everyone thinks Tabby is a great PuTTY alternative.
PowerShell (including Windows PowerShell and PowerShell Core) is a task automation and configuration management framework from Microsoft, consisting of a command-line shell and associated scripting language built on the .NET Framework.
Since recently Microsoft has integrates OpenSSH in Windows 10 natively, so PowerShell (and Windows terminal) may now connect to SSH hosts from the command line, as you would do from LINUX or OS/X. PuTTY however has many more functions.
PuTTY is for remote terminal access, via SSH, Telnet, serial, etc.. Powershell is a shell for scripting not SSH or Telent access.
It's not a remote terminal access tool, it's a scripting language
This alternative is disputed. PowerShell is a legitimate PuTTY alternative, but it might have issues that some users think are important.
ZOC is a powerful and well-established terminal emulator and telnet client, well known for its outstanding user interface with tabbed multi session support.
Just let me say one thing: Try managing 200 hosts for 10+ clients in the host directory of Putty and ZOC.
Much nicer user interface.
tabs, ease of use, very easy to customize
Almost everyone thinks ZOC is a great PuTTY alternative.
ZOC is the most popular commercial alternative to PuTTY.
Terminal (also referred to as Terminal.app) is a terminal emulator included in Apple's Mac OS X operating system. It originated in Mac OS X's predecessors, NEXTSTEP and OPENSTEP, and allows the user to interact with the computer through a command line interface.
Tempest is a free, cross platform, privacy first, SSH client, Local terminal and Kubernetes terminal.
MacTerm (was MacTelnet) on OS X is now a complete replacement for Terminal, allowing access to both local and remote applications.
TinyShell is ideal for anyone who wants command line access to their server, but is limited by HTTP access. Furthermore TinyShell comes with a native MySQL command line client, that some say is even better than MySQL’s own command line interface.
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I think Tabby is overall easier and more smoother to work with. Specially since you get tabs, themes etc. If you just want to ssh into this than that I don't know why you wouldn't switch to tabby.