Waooo amazing ! a million thanks to Oniongirl l I do bow and even kowtow and bang my head on the ground ! ...Incredible how 1 year later all over the internet people with Apple Macs (at least the ones stuck with a PPC and thus with old systems 10.5.8, don't know about 10.6 or 10.7) are still lamenting about this weird and irritating Bluetooth problem and still try here and there to sell you various useless software and magic hacks for your phone to solve this (every cheap little phone with Bluetooth used to be/still is instantly "browsed" with ease right after the "set up Bluetooth device" and when you end up with a Smartphone with a superior OS such as Android 2.3.3 ...impossible to do the usual old "browse device" or even "send file" from your Mac). I even resorted myself to implement recently a ftp or webdav server on my phone in order to be able to browse my phone files and copy files onto my phone from my Mac -a bit heavy and sluggish solution- (best apps tested: Onair, Swiftftp, Andftp ...and also Mobile webdav -paying, but 30 days trial- to access my iDisk from my Android phone but that's another topic)..
This little Oniongirl trick should be written on the first page of the quick set up manual of every Android phone box !
A short reminder (thank also to Jodbr above):
on 10.5.8 in the System Preferences/Bluetooth, once your phone listed in the left column, bottom right "Advanced", then in "Serial Ports", in column "Type" change "modem" to "RS232". Then in the finder/(Bluetooth symbol)/(your_phone)/ ...you get at last the "browse device" ! Works like a charm !
... ah, I almost forgot, you need on your Android (for me here 2.3.3 on an Xperia Arc aka X12 aka LT15i) to make it work, to turn on an/the "Obex FTP server" app...
...by chance I had this good app Astro to check my files and had downloaded the sister app Astro Bluetooth which shows this "Obex FTP server" option as soon as you click on this latter app !
Not clear at all if this "Obex FTP server" is implemented with the 2.3.3 system on my phone but disabled or came with the Astro Bluetooth ? I understood vaguely that on other phones such as HTC it appears in the Settings/Wireless & networks/Bluetooth/advance settings/ ? ...but elsewhere on the net I have seen that the Obex FTP server function was also considered as a vulnerability on Android ...so it was disabled ...and possibly could only be activated only with some protections, such as limited access to SD card, authorization, etc. By consequence, indeed if this usual function is disabled on the Android phone, the Mac can't see it and thus can't list it in its phone services list -and precisely that's what it says during the Bluetooth device setup on your Mac !- and by consequence the Mac also turns on the wrong serial port type, etc. ...it seems at least a good story and explanation, even if not true -couldn't understand why when my usually smart Mac was mating with a so-called Smartphone -possibly brighter than an iPhone, hence the appeal for adultery-, both machines all the sudden became suddenly so stupid concerning this little Bluetooth thing ! ...Well, well, two humans with IQ>150 when by chance the fall in love with each other, aren't they after all often like that, especially concerning small things (ooops, darling, forgot you could speak Chinese, or Hebrew, ...or Bluetooth !) ?-sorry guys, couldn't help it, but I am more a writer-poet than an IT geek !