You do NOT need an Intel Mac to use the Sony Transfer Tool.
You WILL need SxS driver which works on both Intel and G5.
Sony Transfer Tool is NOT on the CD. It is nearly impossible to find on the USA Sony site and I’ve complained to them about this.
Link to USA site. You’ll need version 2.1 which is 2nd from top. Talk about POOR web design!
Link to UK site Much easier to figure out! Downloads on the lower right.
Sony Clip Browser is Intel ONLY.
On Mac, Clip Browser is only for viewing and copying files from card.
It does not require FCP 6.0.2
Sony Transfer Tool runs on my G5 just fine.
Sony Transfer Tool allows one to view files (with codec installed if you have 6.0.2) and rewraps the .mp4 to .mov (for use in FCP 6.0.2 or viewing in QuickTime).
Sony Transfer Tool can be used as a Stand Alone App or as plugin in FCP 6.0.2.
I suspect Sony Transfer Tool will work without FCP 6.0.2 (XDCAM EX codec) installed but that might limit you to rewrapping without clip viewing.
XDCAM codec at 35mbps VBR is a bit more demanding than HDV 25mbps CBR but any computer that can handle HDV can probably handle XDCAM. My aging Dual 2.3GHz G5 can edit XDCAM without issue (cuts and dissolves) so your iMac should certainly handle it.