Unfortunately, myLTO's built-in Bundled LTFS is unable to work on Mac OS 10.15, the oldest Mac OS build supported by myLTO. There are a couple easy ways to work around this and continue to use myLTO on this OS. 

First, updating to a new Mac OS will allow you to then use the Bundled LTFS in myLTO. However, if you would prefer to stay on your current OS version, you can download and install a custom LTFS. The process for this is outlined in the following FAQ.

If you have any issues with this process please reach out to us at support@imagineproducts.com.