The following is copied verbatim from Tim Grey's newsletter. The\nsubject is "Catalog Synchronization" (in LR 5). It addressees the\nquestion brought up by Jennifer.\n\nYou can sign up for Tim's newsletter at [URL]http://www.timgrey.com/[/URL]\n\nThe following is copyrighted by Tim, and I am in violation of\ncopyrighting law by quoting it in its entirety. Don't turn me in,\nplease.\n\n-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\nToday's Question: I use a MacBook Pro with Lightroom 5 for travel\nphotography and a Windows desktop at home. I store my photos on\nexternal hard drives. I would like to install Lightroom 5 on the\nWindows computer for use in final editing of photos. Once I download\nthe Macintosh Lightroom 5 travel catalog photos to my external hard\ndrive at home, please explain how I can update the Windows desktop to\ninclude any edits previously done on the Macintosh. Also, please\ninclude an explanation going in the opposite direction for syncing the\ndesktop and laptop Lightroom 5 catalogs so I may use the laptop for\nfurther editing during travel or perhaps for presenting a slideshow.\nTim's Answer: There are a few possibilities here, depending on your\nspecific needs.\n\nMy personal preference, which closely matches the approach I take,\nwould be to maintain your “master” catalog on the computer at home,\nand a “traveling” catalog on the laptop during travels. You could also\nkeep both the catalog and the images on an external hard drive,\nconnecting that external hard drive to whichever computer you are\ncurrently using. And finally, you could (though I don’t recommend it)\ncopy the catalog from one computer to another whenever you make\nchanges, so you have a duplicate of your catalog on each computer.\nThis last option is fraught with potential problems if you lose track\nof which catalog is really the most recently updated version.\n\nTo me, the simplest and least problematic approach is to maintain a\n“master” catalog at home and then a “traveling” catalog when you’re\naway from home. You can them import new captures into the traveling\ncatalog, updating metadata, Develop settings, and more along the way.\nThen, when you get home, simply use the Import from Another Catalog\ncommand on the File menu to import images from your traveling catalog\ninto your master catalog.\n\nIf you keep your catalog and photos on an external hard drive, this\nprocess is even simpler, because you would just connect the external\nhard drive to whatever computer you’re using, and then import or\nupdate images as needed. Of course, this also means performance will\nsuffer a bit (in most cases) with the catalog on an external hard\ndrive. It also means you need to travel with that external hard drive\nif you plan to work with your catalog, which can be a bit of a hassle\ndepending on the size of that drive.\n\nI strongly recommend against the notion of trying to maintain a\ncomplete catalog across two computers. There is simply too much risk\n(in my mind at least) of updating the catalog on two different\ncomputers and creating a situation where you lose information due to\nsuch confusion.\n\nAs for the subject of where to store your Lightroom catalog, I covered\nthis subject in a little more detail in the article "Location,\nLocation, Location" in the August 2013 issue of my Pixology digital\nmagazine ([URL]http://pixologymag.com/[/URL]).