Hello all, I used a 'BlackBook' on Tiger (10.4.11) to downgrade a MacBook Pro (late 2011) to Snow Leopard when connected in FireWire target mode, since this MacBook Pro didn't come with Snow Leopard installed. I thought it would be temporary after-effect, but according to its user, although not "critical", it's significantly slower than before. I'm still astonished by Mac's long useful lives, to computers standards, and told her that, if the university would sell her this same machine at used price, she should accept. 4GB RAM, an SSD and Snow Leopard would give it more useful life. How can this slowness issue be solved, knowing that this BlackBook is university issue and sports a custom Tiger image ? The Snow Leopard install failed to boot for some unknown reason after I resized its partition using Drive Genius 3, and I had to reformat it two days after installing it. Thus, I will require her BlackBook, again. I don't want her to waste time with an otherwise good machine (2GHz C2D, 2GB RAM).