Answers.Body: <p>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.</p>
  
  <blockquote>
    <p>For this issue fix, please install Mono for Mac OS found at the link below:</p>
    
    <p><a href="https://www.mono-project.com/download/stable/" rel="noreferrer">https://www.mono-project.com/download/stable/</a></p>
    
    <p>and choose Mono 5.10.1</p>
  </blockquote>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-01-29T04:14:21.847Z
Answers.Text: What does installing mono do to fix the problem?  Reading the mono page, it installs support for Microsoft .Net apps.  Would I then install the Windows version of Mindstorms?
Answers.UserDisplayName: efreed
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-10-06T03:53:37.187Z
Answers.LastActivityDate: 2018-10-06T03:53:37.187Z
Answers.UserDisplayName: Peter
Answers.Body: <p>I've installed silverlight as mentioned from this page:</p>
  <p><a href="https://discussions.apple.com/thread/7431216" rel="nofollow noreferrer">https://discussions.apple.com/thread/7431216</a></p>
  <blockquote>
  <p>experienced the same problem.</p>
  <p>Updating Silverlight to the most current version 5.1.41212.0 solved it !</p>
  </blockquote>
  <p>Now the Lego Mindstorm EV3 Software works fine.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-12-25T15:01:25.067Z
Answers.LastActivityDate: 2018-12-26T13:53:43.520Z
Answers.LastEditDate: 2020-06-18T08:28:58.637Z
Answers.UserDisplayName: Estefaninho
Answers.Body: <p>I had this same issue after a Mac OS upgrade to Mojave.  (with Lego Mindstorms EV3 Home Edition)</p>
  
  <p>What fixed it for me was to download the latest installer from lego.com and run the installer again.  </p>
  
  <p>It doesn't make sense because before I did this, I went to "Check For Updates" in Mindstorms and it says there was none.  But something clearly changed, because before the reinstall, there was a non-intuitive little tab with the EV3 logo on it on the top left (as seen in the original question's screenshot) and after the reinstall, that tab has "Lobby" labeled next to the icon.</p>
  
  <p>Updating silverlight didn't help.  I did not try the mono suggestion.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-01-29T04:19:48.253Z
Answers.LastActivityDate: 2019-01-29T04:19:48.253Z
Answers.UserDisplayName: efreed
Body: <p>I have a fresh install of Mojave and of Mindstorms Ev3 home edition.  It seems to work fine but then randomly all the information disappears from the blocks at the bottom of the screen, and sometimes in the program too.  See screenshot.  This problem persists until I restart the software.  Any tips?</p>
  
  <p><em>Note</em>: easy way to reproduce this problem is clicking on a block link from the documentation area, like the 'Loop' block in the screenshot below.  It seems to cause the corruption every time.</p>
  
  <p><a href="https://i.sstatic.net/JUpFo.png" rel="noreferrer"><img src="https://i.sstatic.net/JUpFo.png" alt="enter image description here"></a></p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-10-05T16:38:19.620Z
Comments.Text: It looks like you aren't the only one with this problem: https://www.facebook.com/groups/legomindstorms/permalink/1208245162657041/
  
  Unfortunately, no confirmed solutions at this point in time. Are there any error messages in Console related to the EV3 app?
Comments.UserDisplayName: David Lechner
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-10-08T16:24:59.877Z
Comments.Text: @DavidLechner lego got back to me with a fix.  See answer.  Good customer support!
Comments.UserDisplayName: Peter
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-11-27T15:00:43.757Z
Comments.Text: For what it's worth, I'm having a similar problem with the EV3 Educational version. After I updated to Mojave the EV3 software wouldn't run at all. I've found the Mono hint some other place and tried downloading and installing it. I can run the EV3 software now but EVERY time I do, I get blank programming blocks. I've contacted Lego tech support and they're researching and will get back with me.
Comments.UserDisplayName: Dan Atkinson
Tags: <ev3><mindstorms><mac>
Title: Lego Mindstorms Ev3 home edition on Mac OS Mojave bug - bricks sometimes go blank
UserDisplayName: Peter
ThreadText: # Lego Mindstorms Ev3 home edition on Mac OS Mojave bug - bricks sometimes go blank
  
  (Asked by: username_0 on 2018-10-05)
  
  I have a fresh install of Mojave and of Mindstorms Ev3 home edition. It seems to work fine but then randomly all the information disappears from the blocks at the bottom of the screen, and sometimes in the program too. See screenshot. This problem persists until I restart the software. Any tips?
  
  *Note*: easy way to reproduce this problem is clicking on a block link from the documentation area, like the 'Loop' block in the screenshot below. It seems to cause the corruption every time.
  
  [![enter image description here](https://i.sstatic.net/JUpFo.png)](https://i.sstatic.net/JUpFo.png)
  
  **Tags:** ev3, mindstorms, mac
  > **Comments:**
  > **username_1**: It looks like you aren't the only one with this problem: https://www.facebook.com/groups/legomindstorms/permalink/1208245162657041/  Unfortunately, no confirmed solutions at this point in time. Are there any error messages in Console related to the EV3 app?  
  > **username_0**: @DavidLechner lego got back to me with a fix.  See answer.  Good customer support!  
  > **username_2**: For what it's worth, I'm having a similar problem with the EV3 Educational version. After I updated to Mojave the EV3 software wouldn't run at all. I've found the Mono hint some other place and tried downloading and installing it. I can run the EV3 software now but EVERY time I do, I get blank programming blocks. I've contacted Lego tech support and they're researching and will get back with me.  
  
  ---
  
  ## 3 answers
  
  ### Answer by username_0 on 2018-10-06. Score: 8
  
  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:
  >
  > <https://www.mono-project.com/download/stable/>
  >
  > and choose Mono 5.10.1
  
  > **Comments:**
  > **username_3**: What does installing mono do to fix the problem?  Reading the mono page, it installs support for Microsoft .Net apps.  Would I then install the Windows version of Mindstorms?  
  
  ---
  
  ### Answer by username_4 on 2018-12-25. Score: 3
  
  I've installed silverlight as mentioned from this page:
  
  <https://discussions.apple.com/thread/7431216>
  
  > 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.
  
  
  ---
  
  ### Answer by username_3 on 2019-01-29. Score: 0
  
  I had this same issue after a Mac OS upgrade to Mojave. (with Lego Mindstorms EV3 Home Edition)
  
  What fixed it for me was to download the latest installer from lego.com and run the installer again.
  
  It doesn't make sense because before I did this, I went to "Check For Updates" in Mindstorms and it says there was none. But something clearly changed, because before the reinstall, there was a non-intuitive little tab with the EV3 logo on it on the top left (as seen in the original question's screenshot) and after the reinstall, that tab has "Lobby" labeled next to the icon.
  
  Updating silverlight didn't help. I did not try the mono suggestion.
  
  
  ---
  
  