Hi @mszzzz and welcome to the forums!
You can get MIOS Studio over here:
http://ucapps.de/mios_studio.html
If you have a modern Mac, the newest variant will work well, you might just have to acknowledge its execution in the security preferences. When updating, please make also sure to use a USB port that offers enough power (500mA are required for the operation of LoopA), should it crash during the update you might need to disassemble and use a ST-Link Programmer to flash it - it’s entirely possible, but best to make sure the power supply (and USB cable!) is good.
Best regards and enjoy V2.10!
Peter