Q: How can I reclaim memory/storage so I can burn a DVD with iDVD?

Try http://www.thexlab.com/faqs/lackofram.html

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Move your iPhoto Library and/or your iTunes library to and external HD that is formatted OS X Extended (journaled) and run them from there. Be sure to try the libraries on the EHD before you delete them from the boot drive.

This should easily free up the 25 GB minimum needed for iDVD to create and burn video DVD efficiently.

Follow this workflow to help assure the best qualty video DVD:

Once you have the project as you want it save it as a disk image via the File ➙ Save as Disk Image  menu option. This will separate the encoding process from the burn process.

 

To check the encoding mount the disk image, launch DVD Player and play it.  If it plays OK with DVD Player the encoding is good.

 

Then burn to disk with Disk Utility or Toast at the slowest speed available (2x-4x) to assure the best burn quality.  Always use top quality media:  Verbatim, Maxell or Taiyo Yuden DVD-R are the most recommended in these forums.