Is there a command for Linux which is similar to the
ls /dev/tty.* in the MAC terminal?

I try the path with a stand alone Linux Ubuntu PC. Just to contain the risk a bit.
I had to install the curl program first.
Also I had to install Git first.

After all of this I could still run only the older version of SAMBA and again did not see the USB connection to upload the firmware.

Thank you droftarts for the information!
As a simple user, it feels a bit scary to have to install software which might do what ever to my computer. Eg brew

Would be great to have a firmware update tool which works as a registered and approved Apple software.

I deleted the firmware and tried to install it with the SD card. Also having issues.

Getting more and more to the point to scrap the card.

From the very beginning was not able to connect to the WIFI interface on my duet 2 WIFI
So I decided to install a new firmware!

Tried to install SAM-BA (Not possible on my MAC nor Windows PC due to restrictions)
Tried to install YAT (Same issues)
Finally converted one of my MAC books into LINUX UBUNTU (There I was able to install SAM-BA but could not get the USB connection to work)

Since all of this did not work, I erase the installed firmware and to install a new firmware over the SD card. I have copied all the files to the SD card as instructed. Powered up the card and nothing happened.

I can see the USD interface:
Christians-Mac-mini:~ christianwitsch$ ls /dev/tty.*
/dev/tty.Bluetooth-Incoming-Port /dev/tty.ChristiansiPhone-Wirele
/dev/tty.ChristiansAirPods2-Wire /dev/tty.usbmodem14201

But when I try to access the card I get a blank Terminal!
screen /dev/tty.usbmodem14201 115200
Gives me a white screen!

I can also not send the M997 S0 to install the firmware commend!

What to do?

Anybody can help?

@droftarts I am running macOS Catalina and can not run bossa at all!

This is the message I get.
Process: bossa [47376]
Path: /Applications/BOSSA.app/Contents/MacOS/bossa
Identifier: ShumaTech.BOSSA
Version: 1.0 (1.1)
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: bossa [47376]
User ID: 501

Date/Time: 2020-09-19 13:54:36.827 +0400
OS Version: Mac OS X 10.15.6 (19G2021)
Report Version: 12
Anonymous UUID: 0882F234-69BA-C761-E39C-9AFCC0E1E455

Time Awake Since Boot: 760000 seconds

System Integrity Protection: enabled

Crashed Thread: 0

Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY

Termination Reason: DYLD, [0x1] Library missing

Is there a way to boot the firmware from a sd card?
Or any other way to re-install a new firm ware version on my duet 2 wifi?