USB commnuication between two computers and air

Hey all,
I was wondering if usb communication between two computers is possible and what I would need to get started.
I want to connect two computers and send data through a usb cable. Prior app was using wifi however signal was not consistent and I need consistency.
THanks!

I see you found a solution, but for anyone else who drops in here, if it's an Android app you would need these permissions to be set in the app-descriptor XML:
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>

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I'm trying to find out if it's possible to send MIDI between two computers using a direct USB to USB connection (no MIDI interface). I have not seen this done before, I don't think, but I don't know why it shouldn't be possible.
Thanks for any tips on making this work. I want to connect several computers together to control sound and video for a theatre production, to be triggered from a single MIDI source.

Hi,
I don't think there's something for midi over USB; however, there is an experimental tool for midi over Ethernet. It's called iMidi, and it's written foor PPC, and there's no native Intel version. I tried it with my PPC eMac and Intel iMac, but it took a lot of processing power
See http://openmuse.org/transport/mip_oview.html for more info.
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Hope this helps!
Kind regards,
Jaap

Can't share between two computers, and I've tried everything in this forum

Two Computers - iMac G3, Intel MacBook Pro, both running 10.4.9 and iTunes 7.1.1. I've got iTunes Firewall through port 3689 turned on on both. Both are on a wireless connection on the same subnet. I've got Share library" turned on in iTunes and also "look for shared libraries". Still can't get the libraries to show up. This has worked in the past, but I haven't used it much. The MacBook is new and this is the first time trying to do this, but it did work with the PowerBook it replaced.
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iTunes: How to share music and video - http://support.apple.com/kb/HT2688 - about Music Sharing and Home Sharing
Home Sharing Support page - http://www.apple.com/support/homesharing/
iTunes: Setting up Home Sharing on your computer - http://support.apple.com/kb/HT4620
Understanding Home Sharing - http://support.apple.com/kb/HT3819
iOS8 preview - http://www.apple.com/ios/ios8/family-sharing/ -family sharing
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I am probably not the first to notice that but I am slightly annoyed that I cannot sync my phone with my home and work computers. As a result my work computer and iPhone is now completely depleted of all my contacts. The guys at O2 said that only one computer can sync to the phone.
Pretty poor show I must say. Apple could really have thought about something more user-friendly; i.e enable the phone to be a storage devise rather than a mere carrier of data. I don't think I would have bought the phone if I had known all its snags beforehand despite the fact that it has some great features.
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I think you meant to say "merge"
I am trying at the moment with fingers crossed.
One has Leopard the other Tiger. I hope it works.
Oh I turned on airplane mode and disconnected from the internet just to be sure sync doesn't get stuck.
Asked me to resolve 6 conflicts.. that's a good sign. It is taking a long time though. I hope it won't take so long every time I go from one computer to another. Otherwise it is easier to pass the files via iChat.
The file for address book is addressbook data in library/applicationsupport/address book
for iCal I make an export VCal file and then on the other computer delete the calendar and import the new one.
On the computer with Music I set it to manage manually.
OK I think I will have to do it like that because this took forever then it said it would have to modify 836 entries on my calendar for what was almost the same file.
The photo sync is annoying but I just turn off iPhoto when it asks to find my library (or you can make another program be the default program when you attach a camera and that program will come on then you can just quit it). I find the auto photo sync annoying as it takes so long and I would rather do that manually.

Sync between two computers and iPhones?

We have 2 mac laptops, both running the latest OS. We also have 2 iPhones. How can we have the same calendar on all devices and have the ability to edit that calendar from any computer or iphone?
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With a MobileMe account or a CALDAV server.
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I just got a new MacBook which I use when I travel every week. I have a project that I started at home on my 24" iMac. When I'm at home I would like to continue using the iMac because of the big screen. However I would still like to work on the project when I have time on the road.
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Is it possible to share 1 bluetooth keypad and 1 mouse pad between two computers in target mode? Grab a drink and let me tell you my story.
I purchased two computers... an iMac 27" i7 3.4 16GB RAM and a Mac mini 2.3 i5 8 GB RAM. Both have Thunderbolt capability and are in fact connected by thunderbolt. I have 3 problems...
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Thanks

There was a duplicate post of this question answered at:
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Can I put my library on an external hard drive and use it between two computers? I have two MBP; I will refer to one as computer A and to the other as computer B. I would like to be able to plug in my external hard drive, boot up iTunes, and if there were any changes made to the library previous to its last time accessed on this compluter, they show up on that computer, regardless of being imported on the other.
A hypothetical example: I import three albums called 1, 2, and 3 on computer A over a week or so. I take the external hard drive and plug it into computer B. The entire library which was visible on A, is visible on B, including albums 1, 2, and 3.
Is this possible? If so, what files need to be copied onto the external? I'm trying some different combinations, trial and error basically. Hopefully someone knows and can answer before I mess up my library. I also want to do this to free up space on my computer. All importing will be done from disc.

iTunes/Preferences/Advanced : point your iTunes to the new location of the Library.
Set "Share on local network" in the Sharing tab, and you or everyone on the local network can play your music.
You make a backup first of the Library.
Move the follwing to the new location:
/Users/your username/Music/iTunes/iTunes Music
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I want to know what for is the "Sync" button in Lightning and if there is a way to sync my LOCAL Lightning calendars between two computers. Thanks

I want to know what for is the "Sync" button in Lightning and if there is a way to sync my LOCAL Lightning calendars between two computers. Thanks

sync is about synchronizing network calendars. Simply create a network calendar and synchronize it on multiple machines and forget local calendars.

How do I sync the same library between two computers?

I have an iMac and a Macbook Air, and I am constantly buying music betwen the two computers, and my iPhone. I want to be able to sync up my iPhone on both computers, but it keeps telling me I have to resync my entire phone, which is just crazy. How can I sync up itunes? I have .mac to sync my contacts, mail, etc.

I have an iMac and a Macbook Air, and I am constantly buying music betwen the two computers
Constantly? The MacBook Air is brand new.
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Sync Mail between two computers

After Leopard upgrade, I switched from Entourage to Mail.app, so I'm new to it.
I use two Macs and POP accounts. How can I sync Mail.app between two computers in Leopard? The Sync Service of Smart Folders is not enough for me.
May I use a sync app like Folders Synchrnonizer?
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Both my wife and I have multiple macs and work at home and on the road - we've tried all sorts, and there are 3 approaches that work:
1) IMAP
I know you think this isn't the ideal solution for you, but it is unbelievably simple and rock solid once you get it working.
Set your POP mail addresses to forward all mail to your IMAP address (I use .mac which is brilliant, I don't know about Gmail).
Your mail is server based, so your laptop, desktop, iPhone, webmail from a PC etc. are all always in sync.
You will still get your mail from your old accounts.
You can set rules on any of your machines to filter your mail into folders according to which address they were originally sent to.
HOWEVER the mail you SEND will be FROM your IMAP address, so your clients / friends may get confused if you don't want them to use your IMAP address as your main address.
2)
Leave POP mail on the server.
In Mail preferences, highlight your POP account and click on the "Advanced" tab.
Select "Remove mail from server" to a 1 day if you come home each night.
If you are away for longer, make it 1 week or Never.
This way, if you download mail on your Laptop, when you get home that evening, your desktop will download the same mail again, as it has been left on the server.
It's sort of fake IMAP.
The downside is you can end up with a full mailbox at the server very quickly as you are now leaving messages on it, and you may have to empty the server yourself sometimes (in the same menu you just adjusted).
Also, if you are away from your laptop too long, you may download and later delete-from-the-server messages on your desktop, leaving your laptop out of date.
Use Mac Sync to keep your rules, mailboxes and preferences synced up.
This is the way it's designed to work, so it should work fine.
3)
Drag the Mail folder.
Assuming you're only using one Mac at any one time, you simply move the main mail folder to whichever machine is current.
Quit Mail on both machines.
On your target mac, go to youruserfolder/Library and rename the "Mail" folder to something else like "Mail Old". This is just so you have a backup.
On your source mac, go to youruserfolder/Library and copy that entire folder (not just the mailboxes) either to a drive to transfer to your target mac, or straight to it if you have it networked.
When you start up mail you will find the messages, folders, mailboxes etc. are the same as they were on your source mac.
Now you use your target mac (say your laptop) for a while.
When you are going back to your original source mac (e.g. your desktop), you now repeat the process in the other direction, replacing your desktop's mail folder with your newer laptop's version.
It's really important you use one mac at a time and swap the folder each time you switch.
If you rename the previous version before you overwrite it, you know you have a backup if things get out of sync.
It works really well if you only take the laptop out occassionally, or if you use it exclusively for days at a time (i.e you go away) and you only need to do the transfer every so often.
Also, it helps if you don't have thousands of emails - if your Mail folder is under half a gig, you can do this quickly using a USB keyring or similar. Any bigger and the transfer can get a bit slow.
I use option 1, and felt it was worth changing my email address for.
My wife uses option 2 when she is using her laptop in the day and she can run her desktop each evening the download the mail left on the server.
But she sometimes gets trouble with her popmail server filling up (she gets lots of video and audio attachments) so if she's going away or not planning to use her desktop in the evenings, she reverts to option 3 and removes messages from the server "right away", updating her desktop's mail folder at the end of the week and just using her laptop until then.
Good luck!

How To Share USB Devices Between Two Mac's?

I am musician and have several USB controllers that I would like to share between my Mac pro and my Macbook Pro. (drum pad, keyboard controller,USB midi interface etc.) I have seen several switches offered on the net, however they all seem to be for PC from what I have found really.
Belkin 7-Port Desktop USB Hub (F4U017) was recommended but the language in the the description does not mirror the same types of functions I am seeing mentioned in units made specifically for the PC. (ie "share USB devices between 2 computers.") Did I taint my mind by looking at the PC items first? Is it really as easy as to plug two Macs into the same USB hub and share their devices? Does anyone have a working solution they are using for this type of situation? How do you do it?
If I could share 7 USB devices between the two systems, I think I would be just this side close to Heaven in ease!
thank you!
Cheers,
Marty

Thank you for the lead Direwolf, it felt like there might be a little more to it than just connecting to a hub. I just converted from PC about 8 months ago. Loving my macs!! A KVM switch I had not thought of that. I will look into. I read the wiki page and it seems like a kvm would replace the screen sharing feature the two machines can now use easy enough, only without using the cpu overhead to do it??? (i think is what I understood)
Does anyone have a model they are using and can recommend? (it's a jungle +out there+) I just did a quick search and found mostly kvm switches with 2-ports USB,. ... looking for seven, come on lucky seven! lol!
I will keep looking. In the mean time if readers have additional ideas, I will be very grateful! Cheers!

Technical question: Is it possible to work on the same Lightroom catalog across two computers and have the catalog sync? If so, how??

Technical question:
Is it possible to work on the same Lightroom catalog across two computers and have the catalog sync? If so, how??
Here's a little more information on what I am trying to do.
I have a desktop computer with 4tb worth of pictures that has Lightroom and Photoshop on it. I also have a laptop with Photoshop and Lightroom. I would like to be able to edit those same pictures with their current edits that are currently on my desktop on my laptop. If this can be done, I'm sure I need to be on the same wifi network for my laptop to be able to access my desktop's photo library. I am technically savvy enough to map a network drive, but how do I get my two Lightroom catalogs to sync when I make a change on one of my computers? Would i be working only on one catalog? Or two separate catalogs that would need to be manually synced to the other computer? Would it be beneficial to put my lightroom catalog on something like dropbox?
I'd appreciate any information or tutorials if someone knows how to do this.

I do this by having my LR catalog and photos on an external drive that I swap between the two computers. I am on Windows and have the same drive letter assigned to the drive on both computers.
Because the photos are on a portable drive I back up the portable drive to another hard-drive every night or after important work, because portable drives are susceptible to damage or loss.

How to keep playlists in sync between two computers?

I have a MacBook Pro and a regular desktop Windows 7, and I have all of my music on both of them. However, I constantly keep adding new songs to different playlists all the time, and this makes it hard to keep everything in sync with both computers and my iPod because I usually sync from my Mac.
Right now I export the updated playlists on one of the computers and import it on the other, but it's quite the hassle just to keep some playlists in sync. I tried using home sharing, but it just keeps downloading duplicates everytime I try to import, I would've thought it was smarter by just adding the new songs but appearently it isn't.
So, anyways, is there any easy way for me to automatically keep playlists in sync between two computers?

I am indeed subscribed to iTunes Match. Are you saying that with Match, it will sync my playlists? I will have to check this when I get home. That would really be a nice surprise!
I sync my iPod to iTunes on my Windows 7 box, but use iTunes on my Mac for synching my iPhone 6 and iPad 2. Normally, I'd be modifying a playlist on the Win 7 box, adding or rearranging songs. However, occasionally, I might download a song to the iPhone while out and about. Then, when I'm back at the Mac, I'd do a sync and add that new song to one of the playlists. Should Match then be keeping the playlists on the two machines in sync?
As for the library replication, I had to do that when I first signed up for Match. I was WAY over the 25k song limit, so I made a copy of the library, and in that copy deleted enough songs to get me under the limit. Also discovered scripting and did some really neat things with that tool. Still have the option when I start iTunes to use the old library, just in case there's something there I need to copy to the smaller lib.

USB commnuication between two computers and air

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