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Posted by: pacesetter Wed 13 Oct 2010, 05:39

Hello, and thanks in advance for any responses that may help. I had a Presonus Mobile firestudio that was unplugged from my mac without proper shutdown procedures and it never worked since! Thinking the presounus was the problem (after getting the dreaded red icon !) the store I purchased it at took the return and I bought a Motu mk3. Now it won't load/open/run and isn't even recognized as linked via firewire. I tested my firewire cable, the 400 to 800 converter/adaptor and the motu interface on a friend's mac and it loaded, ran and worked perfectly in minutes. I've gone through presonus forums to make sure I've got rid of all files left that may have corrupted the install of the motu. This error message came up with the first install attempt. (Motu Audio System Mag Mag Core Audio Device Set.cpp, 120 [58:0] ) I tried setting up a different user account with administrative privileges and ran the newest driver from motu-no dice. I believe the problem exists somewhere within my default core audio settings and it may be configured to look for the old presonus. Other things I've done: ran a hardware and software scan for errors with the setup disc from mac. the scan produced a few errors I believe were rectified. I tested an old back up hard drive through firewire and it worked, so that eliminated the firewire port itself from being faulty. The last resort (for my knowledge) is a full system reinstall after backup-I really, really don't want to do that when this computer is less than a year old. If any of you mac audio wizzes have any questions, and more importantly answers, please send me a message. I just want to record some music Thanks from a newbie.

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Posted by: lepetitmartien Thu 21 Oct 2010, 02:54

You should make a general reset of the mac (in fact the power unit, and it'll reset all ports on the motherboard). The procedure depends on your model of mac… Check http://nav.440network.com/out.php?mmsc=forums&url=http://support.apple.com/kb/ht3964 (all Intel models) or reset PMU/SMU if it's still a PowerPC, in the support database at Apple.

Posted by: pacesetter Thu 21 Oct 2010, 04:32

QUOTE (lepetitmartien @ Wed 20 Oct 2010, 18:54)

Posted by: lepetitmartien Sun 24 Oct 2010, 00:48

Yes, by doing so, you force the motherboard hence the ports to recheck everything plugged in. And in curious cases of ports not working, it helps a lot.

Just follow the walk trough (of it's the right one for you model of mac, or search the right one). It may cure the issue, if it does not, I'm stuck.