The 1.0.2 version of CastSync 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. CastSync for Mac lies within System Tools, more precisely Device Assistants. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This free Mac app is a product of Miles Hollingsworth.
From the developer:
CastSync instantly syncs a stream from a Google Cast device to your Mac, so you can pick up right where you left off with iTunes or VLC. CastSync is designed primarily for syncing podcasts with Google Home devices, yet it works for all kinds of streams.
You may want to check out more software for Mac, such as DSLRRemotePro, RAGE SERank or tn5250, which might be related to CastSync.