Is Toast Titanium 20 compatible with macOS 15.6?

If you looked up the Toast Titanium website you would find this information:

Minimum System Requirements:

• Requires macOS 10.14 (64-bit), macOS 10.15, macOS 11.0, macOS Monterey 12.0, macOS Ventura 13.3 or macOS Sonoma 14

So, the answer appears to be ... it does not yet officially support Sequoia macOS 15.x. But that does not necessarily mean it won't work on Sequoia. Other users I know here in these forums have reported that it works fine on Sequoia.

Yes, it works in Sequoia. I also now have it working in Tahoe. In both cases, on a M4 Pro mini.