DigiSpark macでの書き込み方法(備忘録)

macbook pro 13inch(2020 late)
MacOS Catalina 10.15.7
Arduino IDE Ver 2.0.0-beta-4にて

Driverは入れた気はするが、それでも書き込みができずにもんもんとしてたが・・
いまのところ、以下方法でなんとかなった

Preference-Additional boards manager URLs

https://raw.githubusercontent.com/digistump/arduino-boards-index/master/package_digistump_index.json

BOARD MANAGERで、
digistump avr boardsで検索
Disistump AVR　Boards by Digistamp
をInstall

Tools-Board
Digistump AVR Boards-Digispark(Default - 16.5mhz)

Programmer-Micronucleus

// the setup routine runs once when you press reset:
void setup() {                
  // initialize the digital pin as an output.
  pinMode(0, OUTPUT); //LED on Model B
  pinMode(1, OUTPUT); //LED on Model A   
}

// the loop routine runs over and over again forever:
void loop() {
  digitalWrite(0, HIGH);   // turn the LED on (HIGH is the voltage level)
  digitalWrite(1, HIGH);
  delay(200);               // wait for a second
  digitalWrite(0, LOW);    // turn the LED off by making the voltage LOW
  digitalWrite(1, LOW); 
  delay(200);               // wait for a second
  digitalWrite(0, HIGH);   // turn the LED on (HIGH is the voltage level)
  digitalWrite(1, HIGH);
  delay(500);               // wait for a second
  digitalWrite(0, LOW);    // turn the LED off by making the voltage LOW
  digitalWrite(1, LOW); 
  delay(1000);  

}

DigSparkをUSBから外して、書き込みボタンを押すと同士にUSBに差す
以下のようなコンパイル・書き込みログが表示されれて、DigSpark基板上のLEDが点滅すればOK

Sketch uses 774 bytes (12%) of program storage space. Maximum is 6012 bytes.
Global variables use 9 bytes of dynamic memory.

--------------------------
Compilation complete.
Running Digispark Uploader...
Plug in device now... (will timeout in 60 seconds)
> Please plug in the device ... 
> Press CTRL+C to terminate the program.
> Device is found!
connecting: 16% complete
connecting: 22% complete
connecting: 28% complete
connecting: 33% complete
> Device has firmware version 1.6
> Available space for user applications: 6012 bytes
> Suggested sleep time between sending pages: 8ms
> Whole page count: 94  page size: 64
> Erase function sleep duration: 752ms
parsing: 50% complete
> Erasing the memory ...
erasing: 55% complete
erasing: 60% complete
erasing: 65% complete
> Starting to upload ...
writing: 70% complete
writing: 75% complete
writing: 80% complete
> Starting the user app ...
running: 100% complete
>> Micronucleus done. Thank you!

--------------------------
upload complete.

-- 番外

Compilation error: Error: 2 UNKNOWN: fork/exec /bin/avr-g++: no such file or directory

が出たときは
BOARD MANAGERで、
digistump avr boardsで検索

Disistump AVR　Boards by Digistamp
をUninstallし、ArduinoIDEを再起動したら、再度Install
で一応解決・・

-- 番外２

windowsの場合はDriverをインストールしないと認識せず、一向に書き込めない
https://github.com/digistump/digistumparduino/releases
のDriverをインストールすることで書き込めた