Scanning for a newly plugged in MIDI device

Hi all,
I'm currently using javax.sound.midi in my project and I have to implement a feature where the program detects if the user plugs in a new midi device during runtime.
This is a bit of a problem as mentioned here:
http://stackoverflow.com/questions/3752352/java-sound-api-scanning-for-midi-devices
Basically javax.sound caches the providers list for a minute, and I did what was suggested in the thread to set the caching period to 1 second. Unfortunately, this did not work for me (I'm running on Mac OSX). I can see that the providers list are new objects but it still doesn't detect the new plugged in device. However, it does work on the PC. So my question is, does anyone have any suggestions on how to getting this working on all platforms?
Any help would be greatly appreciated!
George

Any Bus powered USB devices that do not have theor own A/C power?
What all USB devices are connected?
BTW,my 2007 iMac failed twice, 1st needing the PSU, HDD replaced, 1 week later needing the PSU replaced again.
Hardware Overview:
Model Name: iMac
Model Identifier: iMac7,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.4 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 6 GB
Bus Speed: 800 MHz
Boot ROM Version: IM71.007A.B03
SMC Version (system): 1.21f4
Get Temperature Monitor to see if it's heat related...
http://www.macupdate.com/info.php/id/12381/temperature-monitor
iStat Menus...
http://bjango.com/mac/istatmenus/
And/or iStat Pro...
http://www.islayer.com/apps/istatpro/
If you have any temps in the 70°C/160°F range, that's likely it.
Except IntelMacs...
http://www.intelmactemp.com/list

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Dec 21 23:30:26 8way kernel[0]: AppleRAID::restartSet - restarting set "sys_2" (C398B450-28A3-4C1D-A6A8-5B617661789D).
Dec 21 23:30:26 8way kernel[0]: AppleRAIDMirrorSet::rebuild complete for set "sys_2" (C398B450-28A3-4C1D-A6A8-5B617661789D).
Dec 22 04:17:22 8way kernel[0]: AppleRAID::restartSet - restarting set "usr_2" (4EA5DD68-D6D0-4CF3-A741-BFBC5ECE8A76).
Dec 22 04:17:22 8way kernel[0]: AppleRAIDMirrorSet::rebuild complete for set "usr_2" (4EA5DD68-D6D0-4CF3-A741-BFBC5ECE8A76).
Dec 22 05:23:16 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 3C6E9EA4-831A-457A-8CA5-6E7E9CBEED25
Dec 22 05:23:30 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 9722C38E-DFF9-468F-8DE5-809432493168
Dec 22 05:23:44: --- last message repeated 1 time ---
Dec 22 05:23:44 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 3C6E9EA4-831A-457A-8CA5-6E7E9CBEED25
Dec 22 05:24:14: --- last message repeated 4 times ---
Dec 22 05:24:19 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 3C6E9EA4-831A-457A-8CA5-6E7E9CBEED25
Dec 22 05:24:56: --- last message repeated 2 times ---
Dec 22 05:24:56 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 3C6E9EA4-831A-457A-8CA5-6E7E9CBEED25
Dec 22 05:25:17: --- last message repeated 1 time ---
Dec 22 05:25:17 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 9722C38E-DFF9-468F-8DE5-809432493168
Dec 22 05:25:31: --- last message repeated 1 time ---
Dec 22 05:25:31 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on EB932B0E-8476-480C-BBD4-53A9A77D9FEF
Dec 22 05:25:45: --- last message repeated 1 time ---
Dec 22 05:25:45 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 3C6E9EA4-831A-457A-8CA5-6E7E9CBEED25
Dec 22 05:26:15: --- last message repeated 2 times ---
Dec 22 05:26:21 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 3C6E9EA4-831A-457A-8CA5-6E7E9CBEED25
Dec 22 05:26:51: --- last message repeated 4 times ---
Dec 22 05:27:12 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 3C6E9EA4-831A-457A-8CA5-6E7E9CBEED25
Dec 22 05:27:33: --- last message repeated 1 time ---
Dec 22 05:27:26 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 9722C38E-DFF9-468F-8DE5-809432493168
Dec 22 05:27:40: --- last message repeated 1 time ---
Dec 22 05:27:40 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 3C6E9EA4-831A-457A-8CA5-6E7E9CBEED25
Dec 22 05:28:24: --- last message repeated 1 time ---
Dec 22 05:28:24 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 9722C38E-DFF9-468F-8DE5-809432493168
Dec 22 05:28:39: --- last message repeated 1 time ---
Dec 22 05:28:39 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 3C6E9EA4-831A-457A-8CA5-6E7E9CBEED25
Dec 22 05:29:14 8way kernel[0]: AppleRAID::completeRAIDRequest - error 0xe00002ca detected for set "usr_2" (4EA5DD68-D6D0-4CF3-A741-BFBC5ECE8A76), member 3C6E9EA4-831A-4
57A-8CA5-6E7E9CBEED25, set byte offset = 222462894080.
Dec 22 05:29:14 8way kernel[0]: AppleRAID::recover() member 3C6E9EA4-831A-457A-8CA5-6E7E9CBEED25 from set "usr_2" (4EA5DD68-D6D0-4CF3-A741-BFBC5ECE8A76) has been marked
offline.
Dec 22 05:29:14 8way kernel[0]: AppleRAID::restartSet - restarting set "usr_2" (4EA5DD68-D6D0-4CF3-A741-BFBC5ECE8A76).
Dec 22 05:32:38 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 9722C38E-DFF9-468F-8DE5-809432493168
Dec 22 05:33:22: --- last message repeated 1 time ---
Dec 22 05:33:22 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 9722C38E-DFF9-468F-8DE5-809432493168
Dec 22 05:34:06: --- last message repeated 1 time ---
Dec 22 05:34:06 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002ca on 9722C38E-DFF9-468F-8DE5-809432493168
Dec 22 05:34:53: --- last message repeated 1 time ---
Dec 22 05:34:53 8way kernel[0]: AppleRAID::completeRAIDRequest - error 0xe00002ca detected for set "sys_2" (C398B450-28A3-4C1D-A6A8-5B617661789D), member 9722C38E-DFF9-4
68F-8DE5-809432493168, set byte offset = 35194773504.
Dec 22 05:34:53 8way kernel[0]: AppleRAID::recover() member 9722C38E-DFF9-468F-8DE5-809432493168 from set "sys_2" (C398B450-28A3-4C1D-A6A8-5B617661789D) has been marked
offline.
Dec 22 05:34:53 8way kernel[0]: AppleRAID::restartSet - restarting set "sys_2" (C398B450-28A3-4C1D-A6A8-5B617661789D).
Dec 22 05:37:24 8way kernel[0]: AppleAHCIDiskQueueManager::setPowerState(0x13d64500, 2 -> 1) timed out after 100113 ms
Dec 22 05:37:44 8way kernel[0]: Failed to issue COM RESET successfully after 3 attempts. Failing...
Dec 22 05:37:44 8way kernel[0]: AppleRAIDMember::synchronizeCacheCallout: failed with e00002be on EB932B0E-8476-480C-BBD4-53A9A77D9FEF
Dec 22 05:37:44 8way kernel[0]: AppleRAID::recover() member EB932B0E-8476-480C-BBD4-53A9A77D9FEF from set "speed" (190EC75B-C702-4481-ABCF-8C5A0D54BBE0) has been marked
offline.
Dec 22 05:37:44 8way kernel[0]: AppleRAID::restartSet - restarting set "speed" (190EC75B-C702-4481-ABCF-8C5A0D54BBE0).
Dec 22 05:37:44 8way kernel[0]: disk4: media is not present.
Dec 22 05:37:59 8way kernel[0]: speed::terminate(kIOServiceSynchronous) timeout
Dec 22 05:37:59 8way kernel[0]: AppleRAID::completeRAIDRequest - underrun detected, expected = 0xa000, actual = 0x9e00, set = "speed" (190EC75B-C702-4481-ABCF-8C5A0D54BB
E0)
Dec 22 05:37:59 8way kernel[0]: disk4: data underrun.
Dec 22 05:37:59 8way kernel[0]: jnl: disk4: dojnlio: strategy err 0x5
Dec 22 05:37:59 8way kernel[0]: jnl: disk4: end_transaction: only wrote 0 of 40960 bytes to the journal!
Dec 22 05:37:59 8way kernel[0]: disk4: media is not present.
Dec 22 05:38:00 8way kernel[0]: jnl: disk4: close: journal 0x13f34e04, is invalid. aborting outstanding transactions

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Scanning for a newly plugged in MIDI device

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