If you are gonna transfer casette masters please transfer them in 24bit either 24/44.1 or 24/48 (DVD audio samples at this rate) of 24/96 then do a SRC and rediter if necessary.
I would still use some kind of USB or Fire wire device to convert the audio - MOTU products work great- love my Ultralite!
ther is a new mackie Onyx blackjack- have not used it
I still find the best most trouble frre way for a transfer is to use a standalone Flash based recorder ( I use my Fostex FR2-LE over the MOTU- but that was with my old iBook- and have yet to try it with my iMac)
you could try a sony M-10 to trasnsfer then pop the MicroSD into an SD card adapter and plug it into your iMac
I would strongly suggest 24bit transfers! - which is easy to do with either of the two methods listed above:
then use the software of your choice
I was using an older version of audacity, but it did not do well when converting sample rates and dither.. it added a small amount of silence to the end of each track when going from 24/48 to 16/44.1
I now am using
Wave Editor (designed for Mac) by
http://www.audiofile-engineering.com/waveeditor/it is free for 2 weeks then $79
the main advantage is that it license izotope SRC
Wave Editor incorporates iZotope's industry best 64-bit SRC™ and MBIT+™ dither. We also have incorporated iZotope's SonicFit™ time/pitch technology. This ensures that Wave Editor delivers the highest fidelity and the best value on the market.
you can try it for free there are some things I wish it had - like better use of keyboard shortcuts for zooming on the wave form and to add a track marker, but once you get it its simple and works great.
also I always use xACT to convert to waves to FLAC ( oh yes save a wav files it's easier for many things over AIFF files- like I used to do) when your files are in Flac form - you can use xACT to write meta data and peropely name and tag each track.
then you can drop your flac's right into toast and burn direct to CD- and now your cd tracks will have all the cd tsxt and other meta data associated with your recordings - such as you, and source info etc.
you might also post or at least read on the team Mac thread here:
http://taperssection.com/index.php?topic=136616.240--Ian