Download the SDK from ESRI's website http://resources.arcgis.com/content/geodatabases/10.0/file-gdb-api

Extract the SDK, and put the contents of the directory in a known location, I used ~/local/filegdb, Example path to one of the files: ~/local/filegdb/lib/libFileGDBAPI.dylib

I use ~/local/filegdb so it can stay isolated in it's own place, you can put it anywhere, but the next few steps might be different

Go into the directory containing the FileGDB SDK, e.g. ~/local/filegdb

ESRI built these dylib's using @rpath's, so to avoid needing to mess with DYLD_LIBRARY_PATH, I updated the @rpath's using install_name_tool

Here is the commands I used to patch the dylibs, this is not required if you want to use DYLD_LIBRARY_PATH yourself:

install_name_tool -id "$(pwd)/lib/libFileGDBAPI.dylib" ./lib/libFileGDBAPI.dylib
install_name_tool -change "@rpath/libfgdbunixrtl.dylib" "$(pwd)/lib/libfgdbunixrtl.dylib" ./lib/libFileGDBAPI.dylib
install_name_tool -id "$(pwd)/lib/libfgdbunixrtl.dylib" ./lib/libfgdbunixrtl.dylib

To verify the paths, use otool -L lib/libFileGDBAPI.dylib and otool -L lib/libfgdbunixrtl.dylib and make sure the paths are correct

We need to make some changes to the configure.in script for GDAL now, since the FileGDB config code hasn't yet been updated for the OSX FileGDB SDK

In the GDAL source root, edit the configure.in and replace it with https://gist.github.com/2005082

In the GDAL source root, run ./autogen.sh to re-create the configure script

Now run the configure script ./configure --with-fgdb=/Users/zacmcc/local/filegdb

The configure script has many options, here is the configure line I use for my custom build: https://gist.github.com/2005091, if you have other GDAL builds on your machine (e.g. homebrew) that you don't want to interfere with, I recommand at least using --prefix=~/local or some other place on your machine besides /usr/local (default for homebrew) or /opt/local (default for MacPorts).

If it worked properly, you should see in the output of configure indicating yes for FileGDB support

make && make install

If everything worked, it's time to test it out! Here's a test file: http://trac.osgeo.org/gdal/raw-attachment/wiki/FileGDB/test_fgdb.gdb.zip

which ogr2ogr # make sure it's the correct ogr2ogr first ogrinfo --formats # list out the formats ogrinfo ~/Downloads/test_fgdb.gdb

#convert FileGDB directly to PostGIS ogr2ogr -f "PostgreSQL" PG:"dbname='somedatabase' host='localhost' port='5432'" ~/Downloads/test_fgdb.gdb