A TAP server for the MACHO catalogue data is now available from:

http://asvo.nci.org.au:8080/macho-tap/tap

We recommend using the TOPCAT tool to access this service. Access via a browser will not work, as the above is only the root for the various TAP function URLs; you will get a 500 error if you access this directly. However, you can hit http://asvo.nci.org.au:8080/macho-tap/tap/availability to verify the service is available.
Direct access to data files is still available via the links below:

MACHO image files
MACHO field centre coordinates
MACHO star coordinates
MACHO photometry files
Suggested worflow for obtaining specifc MACHO lightcurves:

Download the list of MACHO field centre coordinates above, and use these to identify the field overlapping the sky region of interest.

The sky coordinates of every star in a given field is stored in a single CSV file at the MACHO star coordinates area. Use this list to obtain the (field, tile, sequence) identifier for the star(s) of interest.

Using the field and tile identifiers obtained in the previous step, go to the store of MACHO photometry files and download the file corresponding to that (field, tile) pair. This file will contain photometry for every star within that (field, tile), including the specific star of interest identified by the (field, tile, sequence) obtained above.

See the README files in each data directory for details of file formats and further notes.

Acknowledgement to use when referencing MACHO Project data:

"This paper utilizes public domain data obtained by the MACHO Project, jointly funded by the US Department of Energy through the University of California, Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48, by the National Science Foundation through the Center for Particle Astrophysics of the University of California under cooperative agreement AST-8809616, and by the Mount Stromlo and Siding Spring Observatory, part of the Australian National University."