Some Tips

This post won’t make sense unless you want to add a block at each circle and then to go back in and renumber the blocks.
Renumber blocks Lisp from Cad Forum powered by CadStudio.
Lisp Function to add a block at selected circles. (Based on this post)
To load the lisp functions for Mac.
To create blocks with attributes for Mac.

Another renumber lisp that should work on Macs. The first one doesn't work since VLX isn't supported on Macs.