Has anyone renewed your SG passport while carrying MACS?
Can the old passport be retained with an extension instead of getting a new passport?
If a new passport has to be issued, does it invalidate the macs on the old passport and hence one would have to enter MY with the new passport without MACS just to renew the MACS?
SG passport cannot, if a new passport is issued, then you have to use the MACS. I did have a bro who used his old MACS sticker on his new passport, just tear off and use double sided tape. To be safest though, just get new MACS with the new passport.