You can find legacy driver versions (like v1.2) on the Casio Electronic Musical Instruments Support Page .
A community-made, unofficial driver for older USB-only Casio keyboards on Mac is available on GitHub and may work for newer macOS versions like Big Sur. casio lk 300tv draiver skachat
Windows 98, 98SE, Me, 2000, XP (32-bit), and Vista (32-bit). You can find legacy driver versions (like v1
Casio LK-300TV Go to product viewer dialog for this item. is a legacy key-lighting keyboard that requires a model-specific driver for computer connectivity, as it is . Modern operating systems like Windows 10/11 and macOS do not include these drivers natively, and official support for this model has largely ceased for newer platforms. Official Driver & Compatibility Casio LK-300TV Go to product viewer dialog for this item
This keyboard will not work with iPad or iPhone because it lacks "Class Compliant" MIDI support, which is required for mobile devices. Installation & Troubleshooting USB Midi driver for Windows 10 - Casio Music Forums
The official driver was originally designed for older Windows versions.
There is no official Windows 10 or 11 driver. Users often attempt to use the 64-bit USB-MIDI driver (CCUSBX64) available on the Casio Support Site , though success varies. Mac & iOS Support Mac OS (Official): Officially, the does not support Mac OS .