The download archive is not signed. At runtime, you may receive a security warning as an application downloaded from the Internet.
You may be asked for permission to run from the path where you installed TWELITE_Stage.
You may get an installation dialog for the make utility when executing a build.
The toolchain is code-signed, but if the code signature is not properly authenticated, you may be asked for permission to run each executable in the build toolchain (ba-elf-gcc etc.}).
The above is required to give permission or installation work for the TWELITE_Stage to work.
Reference: Manual installation of the make utility
※ Different OS versions and other factors may require a different procedure.
If an error occurs when executing make on the command line (bash), install XCode.
$xcode-select--install
After installation is complete, type "make" and the following message should appear.
Handling of Serial Port
MONOSTICK and TWELITE-R use FT232 series semiconductors from FTDI (https://www.ftdichip.com). In order to use them, you may need to deal with device drivers.
If the serial port does not appear when you start TWELITE-R, you need to unload (disable) FTDI's driver. See "Reference" below.
Reference: utilities from FTDI, Inc.
This utility suppresses the loading of the OS standard device driver when our MONOSTICK or TWELITE-R is inserted, but it also suppresses it for non-MONOSTICK devices (those with the same USB ID).
Download and use D2xxHelper from https://www.ftdichip.com/Drivers/D2XX.htm. You can find the same in our archive in the TWELITE_Stage/INSTALL folder.
Reference: Manual unloading of FTDI device drivers