The 2.20 version of PasteNow 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. We recommend checking the downloaded files with any free antivirus. The program is included in Productivity Tools. This free software for Mac OS X is a product of Tualatrix Chou.
From the developer:
PasteNow is a cross-platform clipboard management tool that focuses on privacy and simplicity, it supports syncing clipboard records across all iOS and macOS devices via iCloud. You can use it to store every kind of temporary data: text, link, image, and even code.
You may want to check out more software for Mac, such as Clyppan, Clipboard Evolved or ClipDoubler, which might be similar to PasteNow.