Here is a first beta test for Teensyduino 1.59.
Arduino 2.0.x, all systems platforms:
use Boards Manager to install Teensy version 0.59.1
(to refresh versions, Shift-Ctrl-P and click "Arduino: Update Package Index")
Arduino 1.8.x, Linux 32 bit:
https://www.pjrc.com/teensy/td_159-beta1/TeensyduinoInstall.linux32
Arduino 1.8.x, Linux 64 bit:
https://www.pjrc.com/teensy/td_159-beta1/TeensyduinoInstall.linux64
Arduino 1.8.x, Linux ARM:
https://www.pjrc.com/teensy/td_159-beta1/TeensyduinoInstall.linuxarm
Arduino 1.8.x, Linux ARM64:
https://www.pjrc.com/teensy/td_159-beta1/TeensyduinoInstall.linuxaarch64
Arduino 1.8.x, MacOS (Catalina to Ventura)
https://www.pjrc.com/teensy/td_159-beta1/Teensyduino_MacOS_Catalina.zip
Arduino 1.8.x, Old MacOS (Mojave)
https://www.pjrc.com/teensy/td_159-beta1/TeensyduinoInstall.dmg
Arduino 1.8.x, Windows:
https://www.pjrc.com/teensy/td_159-beta1/TeensyduinoInstall.exe
PlatformIO, DIY beta support:
https://forum.pjrc.com/threads/71730
Changes since Teensyduino 1.58:
C++17 used for Teensy 3.x and 4.x
Enable LTO options in Arduino Tools > Optimization menu
Fix startup for LTO optimization
Remove serialEvent_default, refactor yield_active_check_flags
Arduino 2.0.x, all systems platforms:
use Boards Manager to install Teensy version 0.59.1
(to refresh versions, Shift-Ctrl-P and click "Arduino: Update Package Index")
Arduino 1.8.x, Linux 32 bit:
https://www.pjrc.com/teensy/td_159-beta1/TeensyduinoInstall.linux32
Arduino 1.8.x, Linux 64 bit:
https://www.pjrc.com/teensy/td_159-beta1/TeensyduinoInstall.linux64
Arduino 1.8.x, Linux ARM:
https://www.pjrc.com/teensy/td_159-beta1/TeensyduinoInstall.linuxarm
Arduino 1.8.x, Linux ARM64:
https://www.pjrc.com/teensy/td_159-beta1/TeensyduinoInstall.linuxaarch64
Arduino 1.8.x, MacOS (Catalina to Ventura)
https://www.pjrc.com/teensy/td_159-beta1/Teensyduino_MacOS_Catalina.zip
Arduino 1.8.x, Old MacOS (Mojave)
https://www.pjrc.com/teensy/td_159-beta1/TeensyduinoInstall.dmg
Arduino 1.8.x, Windows:
https://www.pjrc.com/teensy/td_159-beta1/TeensyduinoInstall.exe
PlatformIO, DIY beta support:
https://forum.pjrc.com/threads/71730
Changes since Teensyduino 1.58:
C++17 used for Teensy 3.x and 4.x
Enable LTO options in Arduino Tools > Optimization menu
Fix startup for LTO optimization
Remove serialEvent_default, refactor yield_active_check_flags