The 1.2 version of Tamperish for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. Tamperish for Mac lies within Internet & Network Tools, more precisely Browser extensions. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This free Mac application is a product of Michal Zelinka.
From the developer:
Tamperish for Safari is an easy-to-use tool for web pages customization. It allows you to inject CSS and JavaScript snippets with ease. Tamperish attempts to recover most of the customization abilities formerly provided by Tampermonkey and Stylish extensions, but using a simpler, more strict injection hierarchy.
You may want to check out more Mac applications, such as VisComPic, Jhoos or dead.licious, which might be related to Tamperish.