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To use the USB serial conversion adapter (USA-19HS / USA-19HS-C) on macOS Big Sur (version 11) / Monterey (version 12), install of the Keyspan driver is needed.
The procedure to install the Keyspan driver is described below.
■FineCut/Coat9 for Illustrator (Macintosh)
Keyspan Driver install procedure
*When using macOS Monterey (version 12) or later, proceed to step 2.
Check that the macOS Big Sur version is 11.4 or later.
① Select [Apple Menu]-[About this Mac].
*If the version of macOS Big Sur is less than 11.4, the Keyspan driver is not available.
In this case, update the OS from [Software Update].
Download the Keyspan driver from the following URL.
File name: USA-19HS/USA-19HS-C Driver (Mac OS Big Sur and Monterey)
Move the Keyspan driver to the [Applications] folder.
① Select [Go]-[Applications].
② Drag and drop the Keyspan driver [Install USA19H Driver] into the [Applications] folder.
Change the execution privileges of the Keyspan driver.
① Select [Go]-[Utilities] in Finder.
② Select [Utilities]-[Terminal] to start the terminal.
③ Enter the following command at the terminal and execute the command by pressing the Return key.
*You can enter it by clicking the [Copy] button and selecting [Edit]-[Paste] in the terminal.
*When entering commands directly, enter the one-byte backslash [\] before the one-byte space.
④ Close the terminal.
① Double-click the Keyspan driver [Install USA19H Driver] placed in the [Applications] folder.
A warning message appears. Select [Open].
② Select [Install USA19H Dext].
A warning message is displayed. Select [Open Security Preferences].
③ In [Security & Privacy], select the Key icon at the bottom left of the screen.
You will be asked to unlock [System Preferences]. Enter the password to unlock.
④ Confirm that [Allow apps downloaded from] (in the orange frame) is activated, and then select [Succeeded].
Confirm that the status of the Keyspan driver is [Succeeded], select [Red Circle] on the upper left, and close the screen.
This completes the installation of the Keyspan driver.