Can the small circular globe speakers which came with the anglepoise iMac, but which have a non-standard plug, be adapted for use as external speakers for a MacBook?
There was a Griffin product, the iFire, that did so. It's discontinued but you may find it on an auction site or in stores that sell off old technology. Info is still o the Griffin site here::
Other than that, I don't know of a way to use them. I have a pair still in the box. Nice speakers but hard to make work without that Griffin gadget.