I contacted Lego support and they got back to me with a fix, which worked great. It also has greatly improved the performance of the application.
For this issue fix, please install Mono for Mac OS found at the link below:
and choose Mono 5.10.1
I just updated to Catalina Beta 10.15 and as expected, the software no longer starts.
The same happens with both the Home and the Education version.
If you are an existing EV3 Desktop software user and depend on being able
to use existing programs or ...
LEGO officially stopped supporting NXT in 2015, however, as of 2019, the original NXT programming software is still available on the official LEGO MINDSTORMS web page.
The original NXT programming software and EV3 desktop programming software are both 32-bit, so cannot run on macOS 10.15 or later.
The new EV3 programming software based on Scratch does not ...
It looks like LEGO have indeed completely pulled the previous version.
According to the announcement last year (emphasis added):
Mac Catalina Issues
[…] We have therefore decided to replace the current EV3 Lab software and EV3 Programming App with a completely new app, called LEGO® MINDSTORMS® Education EV3 Classroom. Featuring a coding language based on ...
I've recently upgraded to OS X 10.11 El Capitan (as a matter of fact, I have the exact same model of computer). I've done some basic tests with the EV3 software without running into any issues. I've downloaded programs to the brick using both USB and Bluetooth.
Base on past experience with OS upgrades with both the NXT and EV3 software, the problems have ...
Check if you have Silverlight plugin on your mac:
Access your hard drive
Double-click the hard drive icon on your desktop
Find the plugin
Navigate to your Internet Plug-Ins directory: /Library/Internet Plug-Ins/
Remove the plugin
Drag any of the following into your trash bin:
Then dowload and install the Silverlight ...
Welcome Violetta. The EV3 Brick has a total of 8 ports - 4 output ports on one side labeled A-D, used for driving motors, and 4 input ports on the other side of the brick labeled 1-4, used for getting information from sensors.
(Image sourced from this page)
Make sure you have plugged your sensors into the correct port, as plugging them into ports A-D will ...
The only way to compile a .ev3 file to a .rbf file is with the "EV3 Lab" software that is not compatible with macOS 10.15 Catalina.
So your options are:
Run Windows or an older version of macOS in a virtual machine, such as VirtualBox
Find someone that can send you the compiled .rbf file, then use a tool such as ev3duder to transfer the program to the EV3.
LEGO Education has a new programming software called EV3 Classroom that will work on Windows, Mac and Chromebooks that can run Android apps. This is probably the best option for the devices listed but won't work on all Chromebooks. It is available from the LEGO Education download page.
The retired Chrome app only works on Chromebooks.
MakeCode could be an ...
The NXT is no longer for sale by Lego, and I don't think they offer technical support for the NXT platform anymore. However, the EV3 software does support NXT. If you can't connect the software to the brick, it might be a driver issue. You can download the official NXT "Fantom" driver from the downloads page of the Mindstorms website - just scroll down until ...
I had the same error message as Stefan on opening. I fixed the problem by installing Silverlight 5.1.41212.0.
El Capitan 10.11.4 (15E27e) (beta)
Late 2015 Retina iMac i7 4GHz
So providing you've got the correct version of Silverlight installed, you should be able to run it.
If you have a LEGO Digital Designer file (.lxf) and want to convert that to an LDraw compatible format so that LDraw-based tools such as Bricksmith can read it, your best bet is to use LDD's Export functionality to save your file as a .ldr file. The full details on this procedure are located here.
This post covers both LDraw to LDD as well as LDD to LDraw ...
I've managed to get leJOS working on macOS Sierra, minus Bluetooth support. Bluetooth support is officially broken and has been for a while. There also hasn't been a new release in years, so a fix likely won't come. Otherwise it still works, if you jump through some hoops.
1. Fantom Driver:
First, you need to install the "Fantom driver". You can ...
FWIW, LEGO MINDSTORMS EV3 Home Edition was crashing on startup (latest Mac OS X Sierra du jour: 10.12.6 16G1113) — presumably (from callisto's answer) because my installed version of Mono was too recent. I uninstalled Mono by typing the following commands in a Terminal:
sudo rm -rf /Library/Frameworks/Mono.framework
sudo pkgutil --forget com.xamarin.mono-...
I've installed silverlight as mentioned from this page:
experienced the same problem.
Updating Silverlight to the most current version 5.1.41212.0 solved it !
Now the Lego Mindstorm EV3 Software works fine.
You can download software for programming the LEGO Mindstorms NXT robots on macOS directly from the LEGO Mindstorms website.
The software is packaged in an ISO image, and there are instructions for how to install it also available on the same page.
Keep in mind that this is the retail version of the software, designed for use with the 8547 NXT 2.0 set, not ...
Beware though. If you install Xamarin on your OSX machine, it will grab the latest Mono framework which is NOT compatible with the EV3 software (I don't recall which MONO version is used by EV3 software).
I have contacted Lego support a few times, and they are not going to update their OSX software. You will either have to then use a different machine or ...
Bluetooth communication from the Mac to the EV3 is done using RFCOMM. This means that the EV3 appears as a serial port on the Mac. Namely /dev/tty.EV3-SerialPort. To send and receive messages from the EV3, you read and write to this virtual file. Bluetooth will show as "connected" as soon as you open this file. You can find some code examples here.
You could try TRIKstudio: http://blog.trikset.com/p/trik-studio.html
This allows you to program a robot based on the LEGO EV3 setup, however while the application itself has English, French and Russian translations, most of the online help is only in Russian.
LEGO Software in general doesn't work that great with Apple computers (I a speaking from experience). Try a couple of different solutions by searching the web, and contact LEGO Support. Hope you find a solution!
The official LEGO.com page says:
Mac OS 10.6, 10.7 and 10.8 with the latest Service packs
This does not include 10.11, but seeing that another official LEGO.com page says:
Fixed Bluetooth crashing in various ways on OSX Yosemite (10.10)
it seems probable that LEGO supports their software better than their homepage :)
So while we don't have a ...