Ken McGuire

Failed To Locate Reason Engine, Exiting

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Ken McGuire

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If you’re having problems accessing Reason 3.0.5 on an Intel Mac after installation and you’re getting the message “failed to locate reason engine, exiting”, every time you try to launch, the likely reason is that your ReWire folder has been set to read only.

You’ll need to change the permissions on the folder to “Read & Write” in order to launch Reason in ReWire mode.

To do this…

  1. Open a Finder window.
  2. Browse your hard drive, going to Library > Application Support > Propellerhead Software.
  3. Control-Click on the ReWire folder and select “Get Info”.
  4. Scroll to the end of the info window and extend the “Ownership & Permissions” (small triangle to the left).
  5. Change the permissions in “you can” to “Read & Write”.

If you can’t change permissions, or the box is greyed out, you’ll need to change the owner (or I did anyway). The default is set to ‘system’, click the lock beside the Owner dropdown and select your username from the menu. You’ll see the permissions box is no longer greyed out. Click the lock to prevent further changes on ownership and set the permissions to “Read & Write”.

Go back to wherever you dragged your original Reason Adapted 3 folder to (I stuck mine in Applications) and launch Reason, problem free.

Comments

40 responses to “Failed To Locate Reason Engine, Exiting”

  1. Danny Avatar
    Danny

    YESSSS! Thank you! Big help

  2. Ken McGuire Avatar
    Ken McGuire

    No worrys Danny, glad to be of help.

  3. Brockbeats Avatar
    Brockbeats

    Hey Ken I’m having the same problem & I’ve done everything that you posted & I’m STILL getting the “Failed To Locate Reason Engine, Exiting” message. Do you have anymore suggestions?

  4. Ken McGuire Avatar
    Ken McGuire

    @brockbeats Afraid not. The write permissions seemed to do the trick with me and since then I haven’t had any issue at all (or come across someone who had the problem and it wasn’t the write-protect issue!), sorry I can’t be of much else help in this case!

  5. Brockbeats Avatar
    Brockbeats

    Thanks anyway Ken, I just have one more question. When I followed your instructions & clicked on “Get Info” (even though on my mac it says “More Info”) the Owner & Permissions screen comes up as you said it would. I selected my username & changed the Access to “Read & Write”. However, underneath that (still in the Ownership & Permissions drop down) there’s another selection that says Group that has “wheel” as a default. Under that I see Access that has “read only” as a default. Do you think I need to change any of these settings also?

  6. Ken McGuire Avatar
    Ken McGuire

    @brockbeats If your user is part of a group, change the user permissions just in case – worst thing you can do is try! Can’t say that I noticed group permissions on my own at the time. Looking at it now, the group is greyed out and is the same as the admin name, again with read-write permissions.

    Can’t hurt to try, just in case!

  7. Brockbeats Avatar
    Brockbeats

    Thanks Ken I’m trying now.

  8. Aaron Kook Avatar
    Aaron Kook

    Worked perfect! Thanks!!!

  9. Brockbeats Avatar
    Brockbeats

    Thanks again Ken it finally worked. I had to trash the REX & ReWire folders then relaunch Reason.

  10. Tom Avatar
    Tom

    this was pissing me off no end!

    im so glad all the things you guys said helped me. i couldnt find out anywhere how to do it.

    try everything. then brockbeats said he trashed rex and rewire folders and it worked, i tried and now its working fine on my mac book!

    LEGAND!

    cheers

  11. halfunction Avatar
    halfunction

    Thank you sir! you have cut through the BS and given a clear and concise solution to a problem that has plagued me for days! I have scoured the propellerheads site and I could not find this information anywhere.

    Someone should really tell them about this issue.

    A million thank yous and I hope have a wonderful day!

  12. Ken McGuire Avatar
    Ken McGuire

    @halfunction

    You’re most welcome.

  13. Aconite Will Avatar
    Aconite Will

    dude…. you just saved me from banging my head against the wall for the 100th time.

    so quick. so easy…..

  14. Ken McGuire Avatar
    Ken McGuire

    @will No bother!

  15. Evan Arredondo Avatar
    Evan Arredondo

    Thank you a million times. The frustration has hopefully ended and I can proceed with my life. Evan

  16. BlueEvilTwin Avatar
    BlueEvilTwin

    all of these comments led to my successful running of reason adapted 3 for ox leopard thanks!!

  17. Nando89Castaneda Avatar
    Nando89Castaneda

    i am having the same problem with mine.. but but when i browse my software the probeller head software is not there…. = / i already dragged the folder to my Hard Drive and installed it.. what can i do? is says failed to locate reason engine every time i try to open it.

  18. Wips Avatar
    Wips

    read/write worked for me but reason needs to be in applications folder…wont run from desktop etc…..

  19. themessenger Avatar
    themessenger

    Thank you so much for this. I was like everyone else in here, working on my 100th bang on that wall…

    finally my computer is ready set go for some music production!

  20. Kevin Avatar
    Kevin

    Wow, thank you man.

  21. mix master marx Avatar
    mix master marx

    thank you soooo much for your help. i wouldn’t be able to make it without you

  22. mix master marx Avatar
    mix master marx

    thank you soooo much for your help. i wouldn’t be able to make it without you

  23. Thejus88 Avatar
    Thejus88

    Yes! It worked! Thank you(:

  24. Svetlin Staikov Avatar
    Svetlin Staikov

    Thank you!:-)

  25. greg Avatar
    greg

    worked like a charm. you da man!

  26. Ken McGuire Avatar
    Ken McGuire

    @Svetlin, @greg No worries – you’re welcome 🙂

  27. 'ndrea Avatar
    ‘ndrea

    thank’s a lot!!!

  28. George Avatar
    George

    Hey, it worked! Fantastic, thank you very much.

    To Nando89Castaneda – Sounds silly, but make sure you’re going straight from…

    Mac HD -> Library->Application Support etc etc.

    I was trying to go from

    My Home(George)->Library->Application Support etc etc… And not finding the relevant folders.

  29. Devin Avatar
    Devin

    Thanks a lot man, saved me a nice long phone call.

  30. Luke Avatar
    Luke

    Thanks a ton! Worked flawlessly.

  31. Shelly Avatar
    Shelly

    Thank you! thank you! thank you! I got frustrated 2 months ago and left it until now, basically because I’m getting a new keyboard.

    This info is incredibly precious so much so that I raised my hands in the air and gave myself a high-five, one for me and one for you!

  32. tim Avatar
    tim

    like everyone else here, you have completely made my day:)

    thanks so much

  33. bob Avatar
    bob

    just spent a hour trying to figure this out, then googled the error message and found this, now its working. Magic! Many Thanks.

  34. Nick Avatar
    Nick

    . Awesome! Thanks so much. P.S. I think you should put a PayPal Donate Now button on your site

  35. Ken McGuire Avatar
    Ken McGuire

    Hey Nick, I’ll keep that in mind 🙂

  36. Jon Wootten Avatar
    Jon Wootten

    Thanks a bunch!!!

  37. songming Avatar
    songming

    you did very perfect work. thank you!

  38. duncan o' cleirigh Avatar
    duncan o’ cleirigh

    Worked a treat thanks a million….

  39. guitaristdan76 Avatar
    guitaristdan76

    Thank you sooooo much for your valuable information. Now I got my Reason 3.0.5 working on my Mac…. God bless you….

  40. Jonathan Benjamin Avatar
    Jonathan Benjamin

    it still say’s it on mines for some odd reason and i did exactly what the directions said

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