1.当arduino ide版本过低时m1mac可能无法使用
出现可能是因为版本过低
Arduino:1.8.8 (Mac OS X), 开发板："Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)" /Applications/Arduino.app/Contents/Java/arduino-builder -dump-prefs -logger=machine -hardware /Applications/Arduino.app/Contents/Java/hardware -tools /Applications/Arduino.app/Contents/Java/tools-builder -tools /Applications/Arduino.app/Contents/Java/hardware/tools/avr -built-in-libraries /Applications/Arduino.app/Contents/Java/libraries -libraries /Users/huqinnan/documents/Arduino/libraries -fqbn=arduino:avr:mega:cpu=atmega2560 -vid-pid=0x2341_0x0042 -ide-version=10808 -build-path /var/folders/ks/7289pmfn7yq2bfn106thcnmm0000gn/T/arduino_build_915040 -warnings=all -build-cache /var/folders/ks/7289pmfn7yq2bfn106thcnmm0000gn/T/arduino_cache_270369 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avr-gcc-5.4.0-atmel3.6.1-arduino2.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avrdude.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.avrdude-6.3.0-arduino14.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.arduinoOTA.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -prefs=runtime.tools.arduinoOTA-1.2.1.path=/Applications/Arduino.app/Contents/Java/hardware/tools/avr -verbose /var/folders/ks/7289pmfn7yq2bfn106thcnmm0000gn/T/untitled446353398.tmp/sketch_feb08a/sketch_feb08a.ino /Applications/Arduino.app/Contents/Java/arduino-builder 返回 139 为开发板 Arduino/Genuino Mega or Mega 2560 编译时出错。
可以去Software | Arduino下载最新版本的ide（老版本ide在新系统上可能无法使用）
需要在设置中“安全性与隐私”——“通用”中打开“任何来源”
打开即可使用
2.安装ch340驱动程序
ch340下载地址：https://github.com/adrianmihalko/ch340g-ch34g-ch34x-mac-os-x-driver/raw/master/CH34x_Install_V1.5.pkghttps://github.com/adrianmihalko/ch340g-ch34g-ch34x-mac-os-x-driver/raw/master/CH34x_Install_V1.5.pkggithub可能无法下载：https://pan.baidu.com/s/1rAXxDZM2hKGyzhyAqKqmpA?pwd=ps8n 提取码：ps8n
安装之前先要删除旧版驱动，终端中执行：
sudo rm -rf /System/Library/Extensions/usb.kext
或者
sudo rm -rf /Library/Extensions/usbserial.kext
重启后即可完成安装
