You can use Dropbox - just read this here

You have to use FontCase app - but it is an amazing app and much better to look at then the OS X Font app
http://log.majouji.me/post/16998327295
Here is the text:
Font management is the nightmare of a lot of designers, and for good reasons. There are many different types of font formats for different uses, and its really difficult to keep up with updated versions of our fonts. PostScript Type 1, TrueType, OpenType PS, Font SuitCase, it never ends.
Although there are fantastic syncing services out there for all types of user data (contacts, email, calendar events, keychains, etc.), there doesnt seem to be a user-friendly and easy solution to sync fonts between computers. Here is the solution I figured out that worked best for me so far.
Tools of the Trade:
More than one Mac;
A Dropbox account;
A Fontcase license;
A bunch of fonts;
An Internet connection (duh!);
Some time to spare.
For this article, I will assume that you downloaded and installed Fontcase and Dropbox on all the computers you wanna sync your fonts accross.
Ready? Lets go.
The Process in 30 Seconds
If youre already familiar with Font Book, Fontcase, Dropbox syncing and all this stuff, heres a simplified version of the process:
Delete all unnecessary system fonts from all your Macs;
Consolidate and import all of your user fonts in Fontcase (on one Mac);
Move your Fontcase vault to Dropbox;
Open Fontcase on your second computer;
Locate the existing Fontcase vault in your Dropbox folder;
???
Profit! (activate fonts as needed)
Need a little more guidance? Read on.
Cleaning Up the Mess
If you want your font management to be really impeccable, you need to perform an extra step at the beginning (this is especially crucial for people who work in prepress).
Mac OS X comes with a lot of different typefaces to support as many languages as possible. There are, however, very few that we actually need and the ones we dont are just bloating our system.
Depending on which version of Mac OS X you are running, the required fonts are slightly different. Here are the required fonts for Mac OS X Lion:
Apple Color Emoji.ttf
AppleGothic.ttf
Geneva.dfont
HelveLTMM
Helvetica LT MM
Helvetica.dfont
HelveticaNeue.dfont
HelveticaNeueDeskUI.ttc
Keyboard.ttf
LastResort.ttf
LucidaGrande.ttc
MarkerFelt.ttc
Menlo.ttc
Monaco.dfont
Symbol.ttf
Times LT MM
Times.dfont
TimesLTMM
This is how your Font Book should look after youve deleted nothing but the required fonts:
Feel free to delete or export any fonts you find in the [User]/Library/Fonts directory. This folder contains all the fonts that you installed on your system.
If you dont use Lion, please consult Kurt Langs Font Management in OS X article for the list of required fonts for your version of OS X.
This step needs to be performed on ALL computers before proceeding to the next step.
DISCLAIMER: Be VERY careful when deleting system fonts. Certain fonts (such as Lucida Grande and Helvetica) can completely mess up your Mac if you touch them. I am not responsible for any lost data, corrupted hard drive or system, or any deficiencies that this manoeuver may encounter. COMPUTER NINJAS ONLY.
Building the Fontcase Library
What we need to do next is collect all your own fonts. The ones that do not come with your system and that you downloaded from the Internet, basically (well call them User Fonts, because thats how theyre called, duh). For that, we will use Fontcase think of it as iTunes, but for your fonts instead of your music. It creates a library (also called a vault) in which it organizes and maintains the file structure automagically (much like the iTunes Music folder). Pretty cool, huh?
Launch Fontcase for the first time. It will ask you if you want to import fonts already installed on your system. Uncheck system fonts and leave the other options checked. This will facilitate the consolidation process.
If you have fonts elsewhere on your computer that are not installed, feel free to import them into Fontcase. Everything is in one place nowno more font files all over the place!
When the main interface launches, deactivate all fonts. Those which are activated are marked by a green bar underneath the fonts name.
Then, open the [User]/Library/Fonts and delete everything there is left there (those are now duplicates, since Fontcase imported them all in the step before).
Moving the Library to Dropbox
This is the last step (I promise!). Our font collection is imported in Fontcase, our Font Book is cleaned up and ready to rock, now we need to incorporate our secret ingredient: Dropbox! *confetti everywhere*
In Fontcase, go to File → Preferences and click the Move button at the bottom of the pref pane. This will allow you to move the Fontcase library to your Dropbox folder. It doesnt matter where you put it in the Dropbox folder, as long as its there. Wait a few minutes for the sync to complete.
Then, open up your second computer (on which you cleaned up the system fonts already, if this applies to you) and open Fontcase. This time, uncheck all importing options and proceed to launch Fontcase. Navigate to File → Preferences again and choose Locate this time. Fontcase will ask you where is the library you want to link to. Navigate to your Dropbox folder and find your Fontcase Library.vault file.
Thats it! Your fonts are now synchronized.
Notes
This syncing solution is not perfect, and there are things you should keep in mind when using this workflow:
Never have Fontcase launched on more than one computer at the same timethis could corrupt your library;
Although your library is backed up on Dropboxs servers, make sure you back it up as often as possibleyou never know when bad things will happen.
Useful Resources
Font Management in OS X, by Kurt Lang
lynda.com course: Font Management
Did I forget something? Do you have any questions? Shoot me a reply on Twitter or feel free to send me an email.
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