Do NOT Update to Basecamp 4.7.0 – MapInstall 4.2.0 is broken!

MapInstall 4.2.0 is broken. You will get it by updating to Basecamp 4.7.0 - however also individual update can happen. So it's possible to be on Basecamp 4.6.2 but have MapInstall 4.2.0 (can update via other Garmin tools too).

Garmin released a new version of Basecamp - 4.7.0 - in order to remove many features that were not in accordance with the GDPR regulation. Actually it's not that 4.6.2 is wrong here - it's that there were a few web services - that Garmin switched off - and those were interlinked into 4.6.2 - so that actually in 4.6.2 some functionality is not working anymore - I could on a quick check however not discover any actual difference otherwise in relation to the GDPR regulations - so 4.6.2 is no different in this regard to 4.7.0 - well and new privacy page/EULA of course).

The big problem is that Basecamp 4.7.0 also ships an updated version of Garmin MapInstall - and that version is broken in so far that it does not reliably/correctly send any maps in .img format anymore! This also applies to original older garmin maps.

On Windows instead of the actual map - only the overview map is sent - so you will have a nearly "empty" map. On OSx the problem with MapInstall 4.2.0 is that it will often crash while sending maps. 


Switch to the relevant tab for information on how to downgrade to Basecamp 4.6.2/4.6.3 on Windows respectively Mac OSx


Basecamp 4.6.2 - WindowsBasecamp 4.6.3 - Mac OSx


If you are a Windows user and upgraded to 4.7.0 you have 4 choices:

  • a) Only downgrade MapInstall to 4.0.4: In order to Downgrade - simply go to C:\Program Files (x86)\Garmin\MapInstall\ folder - then delete all the content of the folder but not of subfolders. Especially leave the "Maps" subfolder. Then Install MapInstall 4.0.4 - Download from here:


  • b) Downgrade to Basecamp v 4.6.2: it can be found here:
  • ATTENTION - you need to first uninstall Garmin Basecamp, Garmin Express, and any other Garmin Software via Windows "Add or Remove Software" except Garmin Mapsource (if you have Mapsource installed, do not delete it because you might lose data saved in Mapsource). As the user data of Garmin Basecamp, Garmin Express or Garmin Homeport is saved in a separate database - you will not lose it.Then Install Basecamp 4.6.2.
  • If you simply install 4.6.2 without uninstalling Garmin Basecamp and Garmin Express, Mapinstall will not be downgraded. Alternatively if you are afraid about losing data - you could first delete the content from C:\Program Files (x86)\Garmin\MapInstall\ folder (but not of subfolders) - then ONLY uninstall Garmin Basecamp via Windows system "Add or remove programs" - then Install Basecamp 4.6.2.


  • c) Use the plain old Garmin Mapsource for sending maps. Yes it still works if you know what to do - just note that it does not check any maps installed - so do not send maps twice. Also it cannot like MapInstall overcome the 4GB limit by splitting up maps that you are sending. Else of course it cannot correctly show the contourlines - but sending maps will work. Mapsource 6.16.3 can be downloaded here:



  • e) Use the create_gmapsupp_img_with_mkgmap.bat Script - this will only work for Maps <4GB however. And you can only install full maps. It is found in the map Installation folder. It requires Java JDK installation and java added to Windows path.
  • Alternatively you can use the create_gmapsupp_img.bat Script - however mind that address search is not possible then.



Actually right now only a part of the overview map is sent - it would be nice if Garmin could send the overview maps in general too - as right now they are only used on Desktop. Would actually speed up the GPS devices a bit - especially if you have no activated Basemap on your device.


Restore Tracks/Routes that you created in Basecamp 4.7.0

If you chose to downgrade Basecamp and already created tracks/routes with 4.7.0 you will need to restore them. While updating/downgrading does not delete any of your data - routes/tracks that you planned with Basecamp 4.7.0 will not appear in Basecamp 4.6.2 after downgrade - only routes/tracks that you had planned before the 4.7.0 update will show up.

To solve that go to:


(note AppData is a hidden folder - you may have to enable windows file explorer to show hidden files and folders)

Now you rename folder 4.6 to 4.6.backup and 4.7 to 4.7.backup

Copy folder 4.7.backup and Rename it to 4.6


In Case of Problems with Reinstalling Basecamp - downgrading MapInstall:

Deinstall All Garmin tools/programs via Windows "Change or Remove a Program". Then delete the Garmin Folder  in "C:\Program Files (x86)". Then Reinstall all Garmin tools/Programs and make sure to use old enough versions (as linked here).

IMHO you do not need to clean the registry of any Garmin entry, nor do you need to remove any Garmin folders that are somewhere else then Program Files folders (so far all Garmin tools are x86 and not 64 bit - it's possible this will change in future - so then also delete Garmin folder inside "C:\Program Files".


You can Either Downgrade MapInstall only, Or Downgrade Mapinstall and Basecamp

While windows users have good alternatives to Garmin MapInstall - on OSx the only real alternative is to use mkgmap.jar to create gmapsupp.img files. That is not so easy to do and requires Java JDK properly configured.

  • a) I Therefore strongly recommend to Downgrade to Basecamp 4.6.3 - To do so first Uninstall Garmin Basecamp 4.7.0 Then make sure that also Garmin MapInstall installation folder is removed/empty - If not uninstall all other Garmin software too. Then install Basecamp 4.6.3.


  • b) You could try to simply Install Garmin MapInstall 4.1.1. - I'm not sure if this works by just executing the installer. I think not. That means you first have to uninstall Mapinstall 4.2.0 - then Install only MapInstall 4.1.1 / MapManager 4.1.1. That way you could keep Basecamp 4.7.0 but I don't know why you would like to do so as Basecamp 4.7.0 is only a regression.


Basecamp 4.6.3 for OSx can be downloaded here: (here you find all Garmin Tools for  Mac OSx for download - if you miss something else)


MapInstall 4.1.1 and MapManager 4.1.1. for Mac can be downloaded here:


13 comments to Do NOT Update to Basecamp 4.7.0 – MapInstall 4.2.0 is broken!

  • Super Danke,
    es hat funktioniert.
    Ich mache kein Update mehr!!!!

  • marsiti

    how can we improve map printing using BaseCamp? The lines and the contour lines are too thick and if you reduce the detail, it will no longer print tracks and paths

    • extremecarver

      I would never use the print function of Basecamp. The best thing to do is take screenshots from Basecamp on a high resolution monitor (if you don’t have one I don’t know if you could create a scrollable virtual 4k monitor and take a screenshot of the full display as if you had a 4k screen).

  • JimIsle

    Hi Felix
    I have tried all the suggested (above) solutions. I am able to download a map to my Garmin Montana 610 but when I turn on the unit after disconnecting USB I consistently get a message “Can’t authenticate Maps. Contact content seller for help.”
    My recently downloaded openmtb map is also not in the list of maps….from the maps menu on my unit.

    When I look in the Garmin folder on the unit I see that the openmtb map is there….named “gmapsupp.img”.

    I heading on a hiking trip to Italy soon….and would really like to have my gps & maps.

    Any suggestions?

    Jim (Canada)

  • Thomas Mellak


    • extremecarver

      Kann es sein dass du ein extrem altes Air hast – evtl ist für deine OSx Version 4.2.4 die höchste Version? Oder hast du etwa die Version von MapInstall abgelesen?
      Und nein – wenn dein OSx nicht extrem alt ist – kannst du die 4.6.3 einfach runterladen und drüberinstallieren (oder bei 4.2.4. bleiben wenn es die denn tastsächlich ist).

  • boccia77

    Vielen, vielen Dank!
    Bin gerade in Ligurien und hatte schon befürchtet die Touren einschränken zu müssen. Habe Variante a) gewählt. Nun funktioniert alles. Danke! Wenn ich nicht schon gespendet hätte, hätte ich dies spätestens jetzt getan. Super!

  • mattia.foachi

    Grazie Felix, come sempre aggiornato e competente.

    Tradotto con google translate:

    Thanks Felix, as always updated and competent.

  • paddlernick

    Hi Felix,
    Grrrr Garmin updates and GDPR.
    On my Mac mini, playing around and getting v annoyed I eventually uninstalled the latest version of Mapinstall and downloaded the one you recommend without uninstalling Basecamp. At the moment the map transfer seems to work most of the time, not always but mostly. I check up on the GPS to make sure, it takes time but then I’m sure its loaded correctly.
    Sometimes it doesn’t load the contours and other times it didn’t load the rest of the info. At least it works sometimes!
    I also rang Garmin UK and complained and the operator said he hadn’t heard of this but has noted it.
    Keep up the great work and lets hope Garmin rectify Mapinstall.

    • extremecarver

      Hi Nick, you need to make sure to select maps by holding the mouse button and dragging over the WHOLE area you need – on the outside only contours or only map will stand over for some distance (noticeable by lighter shading when selected in MapInstall). Also make sure never to select by single clicking – then you only get either maps or contourlines.

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