KompoZer is not officially supported on the latest version of macOS (including MacBook Air M1, 2020). However, you may try alternative web development tools that are compatible with your system, such as BlueGriffon or Adobe Dreamweaver.
Tool to check, optimize and synchronize your website.
Professional WordPress blogging application.
HTML-Optimizer speeds up your site by optimizing both HTML and script code of your Web pages, and optimizing your JPEG and PNG images.
KompoZer is not officially supported on the latest version of macOS (including MacBook Air M1, 2020). However, you may try alternative web development tools that are compatible with your system, such as BlueGriffon or Adobe Dreamweaver.