I then updated to Snow Leopard 10.6.8 in order to be able to update to Mavericks. I'm installing Mavericks on my computer right now. Here's the beginning of the update to Mavericks. Notice how different the dock is in Snow Leopard.
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BTW, the reason I went through all this trouble is that the owner of the pawn shop I bought the MacBook from had updated the MacBook to Yosemite before putting it on sale. I wanted Mavericks and that meant wiping the hard drive and installing Snow Leopard 10.6.3, then through several updates, ending up on Mavericks.