My Yamaha CRW-F1 is my only drive that will burn CD-R's at 1x. I have Plextor Premium (I & II) and the slowest they will burn is 2x.
You will have to find an old CD-R/W burner to be able to burn at 1x. Honestly 8x and Tayio Yuden CD-R's should be good enough unless you need a master recording or something of that nature.
This is using a Windoze machine. I have no idea about Mac applications.
Why is this thread in Blu-ray and HD DVD Hardware forum?