Mac Cd-rw? Options

[jeb52]

I have a TiBook with a cd-rw drive. I have only used a few cd-rws, yet inevitably I cannot re-write. I have tried using disk-utility to erase the disks, only the info says the disks are 'read only' (despite the disk showing up as 'cd-rw' on my desktop).

So I wonder, which brand (in the USA, my last failed attempt was with a TDK) is compatible with a Mac? Or, is there a cd initialization procedure I am missing?

Thanks,

Jonathan