So I assume it is these examples
https://github.com/PaulStoffregen/SD/blob/master/examples/CardInfo/CardInfo.ino
I do not find SD.begin() on it but did try const int chipSelect = BUILTIN_SDCARD; with this result :
Arduino: 1.6.12 (Mac OS X), TD: 1.31-beta1, Board: "Teensy 3.6, Serial, 180 MHz, US English"
/Users/Garug/Documents/Arduino/_3.6_SD_test/_3.6_SD_test.ino:39:24: error: 'BUILTIN_SDCARD' was not declared in this scope
const int chipSelect = BUILTIN_SDCARD;
^
Multiple libraries were found for "SD.h"
Used: /Users/Garug/Desktop/Arduino 1_6_12.app/Contents/Java/hardware/teensy/avr/libraries/SD
Not used: /Users/Garug/Desktop/Arduino 1_6_12.app/Contents/Java/libraries/SD
Error compiling for board Teensy 3.6.
Invalid library found in /Users/Garug/Documents/Arduino/libraries/fire: /Users/Garug/Documents/Arduino/libraries/fire
Invalid library found in /Users/Garug/Documents/Arduino/libraries/OSX: /Users/Garug/Documents/Arduino/libraries/OSX
Invalid library found in /Users/Garug/Documents/Arduino/libraries/SdFatBeta20120108: /Users/Garug/Documents/Arduino/libraries/SdFatBeta20120108
Invalid library found in /Users/Garug/Documents/Arduino/libraries/SerialPortBeta20120106: /Users/Garug/Documents/Arduino/libraries/SerialPortBeta20120106
Invalid library found in /Users/Garug/Documents/Arduino/libraries/fire: /Users/Garug/Documents/Arduino/libraries/fire
Invalid library found in /Users/Garug/Documents/Arduino/libraries/OSX: /Users/Garug/Documents/Arduino/libraries/OSX
Invalid library found in /Users/Garug/Documents/Arduino/libraries/SdFatBeta20120108: /Users/Garug/Documents/Arduino/libraries/SdFatBeta20120108
Invalid library found in /Users/Garug/Documents/Arduino/libraries/SerialPortBeta20120106: /Users/Garug/Documents/Arduino/libraries/SerialPortBeta20120106
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
And do not know what is the correct library and how to tell to use it.