Hmm interesting. have you checked not eh apple support forums as I've never heard of a way to refresh usb ports. I hope you can get your problem solved. I have not had this problem yet and let's hope I never do.
Be blessed. On Sep 30, 2012, at 11:59 AM, "David Griffith" <d.griff...@btinternet.com> wrote: > Is there a way to force mac OS to refresh USB devices. > > > > Several times now I have had problems with my Imac not recognising and > ignoring devices plugged into USB ports. > > Invariably when I plug these devices into my Windows machine they are > recognised fine. > > So for example recently , after several months use, my Imac refused to > recognise the existence of my USB Hub. I thought I had a faulty hub but when > i put this hub onto my laptop it worked fine. > > I have resolved this particular problem by simply switching usb hubs and > the IMac is now happy with the USB hub that was PREVIOUSLY plugged into the > windows laptop. > > However this is too frequent a problem on the Imac. For example, a couple > of weeks ago it refused to recognise a scanner that was plugged in. I again > tried this on a windows machine and all was fine with the scanner. > > I plugged another scanner into the Imac and this time it went slightly crazy > installing dozens of versions of the scanner so I have abandoned this > scanner also. Installing VueScan casued no improvement. > > The ports are fine as they work fine with other devices such as keyboard, > flash drives, printer etc. > > Is there away a forcing a Mac to re-interrogate or refresh it USB ports so > that it wakes up and recognises devices plugged into it that it appears to > forget ? > > > > I have Googled this and clearly other people have experienced this problem > but I have not found an answer yet. > > > > David Griffith. > > > > <--- Mac Access At Mac Access Dot Net ---> > > To reply to this post, please address your message to > mac-access@mac-access.net > > You can find an archive of all messages posted to the Mac-Access forum at > either the list's own dedicated web archive: > <http://mail.tft-bbs.co.uk/pipermail/mac-access/index.html> > or at the public Mail Archive: > <http://www.mail-archive.com/mac-access@mac-access.net/>. > Subscribe to the list's RSS feed from: > <http://www.mail-archive.com/mac-access@mac-access.net/maillist.xml> > > The Mac-Access mailing list is guaranteed malware, spyware, Trojan, virus and > worm-free! > > Please remember to update your membership options periodically by visiting > the list website at: > <http://mail.tft-bbs.co.uk/mailman/listinfo/mac-access/options/> <--- Mac Access At Mac Access Dot Net ---> To reply to this post, please address your message to mac-access@mac-access.net You can find an archive of all messages posted to the Mac-Access forum at either the list's own dedicated web archive: <http://mail.tft-bbs.co.uk/pipermail/mac-access/index.html> or at the public Mail Archive: <http://www.mail-archive.com/mac-access@mac-access.net/>. Subscribe to the list's RSS feed from: <http://www.mail-archive.com/mac-access@mac-access.net/maillist.xml> The Mac-Access mailing list is guaranteed malware, spyware, Trojan, virus and worm-free! Please remember to update your membership options periodically by visiting the list website at: <http://mail.tft-bbs.co.uk/mailman/listinfo/mac-access/options/>
