MacOS High Sierra 10.13.5 (17F77) is a major update to the macOS operating system, released by Apple in 2018. This version of the operating system focuses on performance and stability improvements, as well as bug fixes. It can be downloaded from the App Store or from an ISO image. For those who want to install MacOS High Sierra from scratch, the macOS High Sierra download ISO is the best option.

The main feature of MacOS High Sierra 10.13.5 (17F77) is its improved security. Apple has added a new FileVault feature which encrypts files without the user having to take any action. The update also includes a new security system called Gatekeeper, which helps protect users from malicious software. Additionally, the update includes improved Safari and Mail applications, as well as better support for external GPUs.

In addition to the security and performance improvements, MacOS High Sierra 10.13.5 (17F77) also includes several new features. Among them are the ability to use external GPUs with Macs, improved photo editing tools, and enhanced Siri integration. Furthermore, the update includes support for the new Apple File System (APFS) which offers faster and more reliable storage.

The macOS High Sierra download ISO is available for free from the App Store. It can also be downloaded from other sites such as Softpedia and MacUpdate. After downloading the ISO file, it can be burned to a DVD or used as an installer. To install MacOS High Sierra from scratch, users must first create a bootable USB drive. Then, they can use the Installer app to install the OS.

MacOS High Sierra 10.13.5 (17F77) offers many benefits to users. It provides improved security, performance, and stability; as well as a plethora of new features. Plus, its easy-to-use installation process makes it accessible to all users. With the macOS High Sierra download ISO, users can easily install this powerful operating system on their computers.