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new to 3D printing and I've tried to download the free software and I get a message to says software needs updating please contact developer 


see attached Pic


any help would be greatly appreciated 




Screenshot 2020-01-10 at 18.31.10.png

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    This is a MacOS security feature which prevents unsigned applications to start (for the first time only)


    Open your Finder got to Applications and right click on the Cura application and select open. Then another message box appears asking if you want to start it or not.


    Every further start goes then completely normally.

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    When you download Cura you get a *.dmg file, which opens automatically. There you find the application itself "Ultimaker Cura".

    Just drag and drop the file to your application folder shown in the Finder sidebar.


    Then go to the application folder, scroll down to "Ultimaker Cura" do the right click, open, confirm and that's it.

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    Posted · IOS Support

    Nope doesn't work every time I restart the Mac 

    and try to open Cura IOS tries to verify the file and up pops the original screen shot I posted.


    sorry to be a PITA


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    Posted · IOS Support

    Screenshot 2020-01-11 at 18.54.52.png

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    MacOS normally flags the file after you confirmed it to open anyway.

    When this is not working in your case then it probably cannot write the flag, which is normally the case when you start Cura directly from the DMG image and not from the application folder.


    But when you have done this and it is still not working, I am lost and have currently no more ideas. But it is not a problem of Cura, you will have the same issues with other applications which are not signed by Apple.

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    24 minutes ago, Smithy said:

    you will have the same issues with other applications which are not signed by Apple.


    Small correction: He will have the same issues with other applications which are not signed by a registered developer. It is strange that the official Ultimaker Cura app is not signed with a developer certificate. @nallath, care to shine your light on this?

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    You are right Aldo, here the details of Cura:


    @MBP16 ~ % codesign -dv --verbose=4 /Applications/Ultimaker\ Cura.app
    Executable=/Applications/Ultimaker Cura.app/Contents/MacOS/cura
    Format=app bundle with Mach-O thin (x86_64)
    CodeDirectory v=20200 size=17777 flags=0x0(none) hashes=550+3 location=embedded
    Hash type=sha256 size=32
    CandidateCDHash sha1=e2599bb87681646988c3d28cdab1d251eb478f26
    CandidateCDHashFull sha1=e2599bb87681646988c3d28cdab1d251eb478f26
    CandidateCDHash sha256=623a11c6941539a73cf3a1ac1b792672cd52c94f
    CandidateCDHashFull sha256=623a11c6941539a73cf3a1ac1b792672cd52c94fb3a856b50d9177785fb542de
    Hash choices=sha1,sha256
    Page size=4096
    Signature size=8917
    Authority=Developer ID Application: Ultimaker B.V. (V4B3JXRRQS)
    Authority=Developer ID Certification Authority
    Authority=Apple Root CA

    Timestamp=23.12.2019 at 11:03:35
    Info.plist entries=13
    Sealed Resources version=2 rules=12 files=6157
    Internal requirements count=1 size=180


    So in my opinion it is signed!


    @Riley9 Have you downloaded Cura from the Ultimaker website?

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