macOS Catalina
If you're using one of these computers with OS X Mavericks or later, you can install macOS Catalina. Your Mac also needs at least 4GB of memory and 12.5GB of available storage space, or up to 18.5GB of storage space when upgrading from OS X Yosemite or earlier. To get the latest features and maintain the security, stability, compatibility, and performance of your Mac, it's important to keep your software up to date. Apple recommends that you always use the latest macOS that is compatible with your Mac. The version of macOS that came with your Mac is the earliest version it can use. For example, if your Mac came with macOS Big Sur, it will not accept installation of macOS Catalina or earlier. If a macOS can't be used on your Mac, the App Store or installer will let you know. For example, it might say that it's not compatible with this device or is too old to be opened on this version of macOS.
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BlackArch Linux
BlackArch Linux is an Arch Linux-based penetration testing distribution for penetration testers and security researchers. You can install tools individually or in groups. BlackArch Linux is compatible with existing Arch installs. The BlackArch Full ISO contains multiple window managers. The BlackArch Slim ISO features XFCE Desktop Enviroment. The full ISO contains a complete, functional BlackArch Linux system with all the available tools in the repo at build time. The slim ISO contains a functional BlackArch Linux system with a selected set of common/well-known tools and system utilities for pentesting. The netinstall ISO is a lightweight image for bootstrapping machines with a minimal set of packages. BlackArch Linux is compatible with existing/normal Arch installations. It acts as an unofficial user repository. You can install BlackArch Linux using the Slim medium which features GUI installer.
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Gentoo
Gentoo is a free operating system based on Linux that can be automatically optimized and customized for just about any application or need. Extreme configurability, performance, and a top-notch user and developer community are all hallmarks of the Gentoo experience. Thanks to a technology called Portage, Gentoo can become an ideal secure server, development workstation, professional desktop, gaming system, embedded solution, or something else, whatever you need it to be. Because of its near-unlimited adaptability, we call Gentoo a metadistribution. Of course, Gentoo is more than just software. It is also a community around the distribution. Gentoo benefits from around 250 developers and thousands of users, many of which are experts in their fields. The distribution project provides the means for the users to enjoy Gentoo: documentation, infrastructure, release engineering, software porting, quality assurance, security followup, hardening, and more.
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Ubuntu
Better security. More packages. Newer tools. All your open source, from cloud to edge. Secure your open source apps. Patch the full stack, from kernel to library and applications, for CVE compliance. Governments and auditors certify Ubuntu for FedRAMP, FISMA and HITECH. Rethink what’s possible with Linux and open source. Companies engage Canonical to drive down open source operating costs. Automate everything: multi-cloud operations, bare metal provisioning, edge clusters and IoT. Whether you’re a mobile app developer, an engineering manager, a music or video editor or a financial analyst with large-scale models to run — in fact, anyone in need of a powerful machine for your work — Ubuntu is the ideal platform. Ubuntu is used by thousands of development teams around the world because of its versatility, reliability, constantly updated features, and extensive developer libraries.
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