No, a WIMP is the theoretical dark-matter equivalent of a particle. A MACHO is a low-energy star or whatever that would explain the apparent presence of dark m

No, a WIMP is the theoretical dark-matter equivalent of a particle. A MACHO is a low-energy star or whatever that would explain the apparent presence of dark matter without actually requiring anything exotic like WIMPs. The idea is that these objects are (relatively) massive, numerous, and so low-energy that they are hard to detect and their combined mass would theoretically explain the effects we currently attribute to dark matter. Or in other words, a WIMP would be like claiming that your fridge is disintegrating your cheese, and a MACHO would be the kid raiding the fridge for cheese at midnight when you're asleep.