Arduino Library On Mac

Follow these steps to install a library in Mac OSX.
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Close the Arduino IDE

The open-source Arduino for Mac (IDE) makes it easy to write code and upload it to the board. It runs on Windows, macOS, and Linux. The environment is written in Java and based on Processing and other open-source software. This software can be used with any Arduino board. Most intriguing features are: Long-awaited new arduino-builder. Feb 19, 2020 Arduino-LMIC library This repository contains the IBM LMIC (LoRaWAN-MAC-in-C) library, slightly modified to run in the Arduino environment, allowing using the SX1272, SX1276 transceivers and compatible modules (such as some HopeRF RFM9x modules and the Murata LoRa modules).

First make sure that all instances of the Arduino IDE are closed. The IDE only scans for libraries at startup. It will not see your new library as long as any instance of the IDE is open!

Download the Zip File

Make sure to select a released version of the library. Some library repositories are still in development, and may contain unreleased or untested code. The 'Releases' button takes you to the tested and released versions.

  1. Click the 'Releases' button on the Github repository page to find the released version of the library.
  2. Then download the zip file.

Find it in the Downloads Folder

OSX will automatically open the zip file there.

Drag it to your Libraries Folder

Open your sketchbook Libraries folder and drag the master folder from Downloads into it.

Give it a Legal Name

The IDE will not recognize folders with dashes in the name. So you must rename the Github Master Folder. Underscores are OK!

Re-start the IDE

Restart the Arduino IDE and verify that the library appears in the File->Examples menu.
Load one of the library examples to test.

Verify that it Compiles

Click the check-mark icon in the upper left and verify that the example sketch compiles without errors.
This guide was first published on Feb 16, 2013. It was lastupdated on Feb 16, 2013.This page (Installing a Library on Mac OSX) was last updated on Apr 10, 2020.

'xxxx' does not name a type

This is the most common library related error message and it means that the compiler could not find the library. This can be due to:
  • Library is not Installed (see previous pages in this guide)
  • Wrong Folder Location
  • Wrong Folder Name
  • Wrong Library Name
  • Library Dependencies
  • Forgot to Shutdown the IDE
See below for solutions to these problems.

Wrong Folder Location

The IDE will only find standard libraries and librariesinstalled in the sketchbook Libraries folder.It will not be able to find libraries installed elsewhere.

The Library folder must be at the top level of the Librariesfolder. If you put it in a sub-folder,the IDE will not find it.

Note: Some third-party library repositories have different folder structures. You may need to re-arrange things to make sure that the library files are at the top level of the folder. WaveHC is one example of this. The actual library folder is a folder within the top-level repository folder.

Don't have a 'Sketchbook' folder

It is there. But on a Windows or Mac/OSX machine it may not be named 'Sketchbook'. See the page titled 'Where to Install your Libraries'.

Incomplete Library

You must download and install the entire library. Do not omit or alter the names of any filesinside the library folder.

Wrong Folder Name

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The IDE will not load files with certain characters in thename. Unfortunately, it doesn’t like thedashes in the zip files names generated by Github. When you unzip the file, rename the folder sothat it does not contain any ‘illegal’ characters. Simply replacing each dash (‘-‘) with andunderscore (‘_’) usually works.

Wrong Library Name

The name specified in the #include of your sketch must matchexactly (including capitalization!) the class name in the library. If it does not match exactly, the IDE willnot be able to find it. The example sketches included with the library will have the correct spelling. Just cut and paste from there to avoid typos.

Multiple Versions

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If you have multiple versions of a library, the IDE will tryto load all of them. This will result incompiler errors. It is not enough tosimply rename the library folder. It mustbe moved outside of the sketchbookLibraries folder so the IDE won’t try to load it.

Library Dependencies

How To Find Library On Mac

Some Libraries are dependent on other libraries. For example, most of the Adafruit GraphicDisplay libraries are dependent on the Adafruit GFX Library. You must have the GFX library installed touse the dependent libraries.

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“Core” Libraries

Some libraries cannot be used directly. The GFX library is a good example ofthis. It provides core graphics functionalityfor many Adafruit displays, but cannot be used without the specific driverlibrary for that display.

Forget to shutdown the IDE

The IDE only searches for libraries at startup. You must shut down ALL instances of the IDEand restart before it will recognize a newly installed library.

This guide was first published on Feb 16, 2013. It was lastupdated on Feb 16, 2013.

Arduino Library On Mac Computer

This page (Common Library Problems) was last updated on Apr 10, 2020.