TBC-1000 model is a good framesync TBC.
Note: Exact unit can be good or bad -- beware of random
eBay sellers!
Frame/framesync TBC is required for stability of the signal. Not image quality, but signal/invisible quality. Bad signal = bad or no capture, beyond VCR output quality.
No opinion on VCR, but lacking line TBC isn't a good sign. ES10/15 must be added, at minimum, if not upgrading to better VCR with line/field TBC (JVC, Panasonic, rebadges, few others).
Tape adapter is fine, rebadged Matsushita (aka JVC C-P7U type).
Canopus DV not suggested, but for PAL is acceptable. You do lose color quality, 4:2:0 vs. 4:2:2 (lossless capturing). But it's comparable to DVD loss, not as bad as NTSC DV 4:1:1 color destruction.
Ah, Mac. Yes, DV one of the few options. A few ATI 600 USB clones can do uncompressed, but Mac does have many good capture options.
Ditch Handbrake. It has so many issues. Although discontinued in recent past, Hybrid has a superior Mac version. Handbrake makes many bad choices, has lots of inferior filters for NR and deinterlacing.
I don't believe MPEG Streamclip is lossless for non-MPEG, and not even sure if DV can be used with it. DV editing is generally done with other tools like FCP.