The intersection of Bitcoin advocates and Mac users may not be enormous, but malefactors saw this small market as an opportunity to make some fast cash. Some Bitcoin tracker apps for Mac have been infected with malware — and until yesterday, you could have found them on the reputable software repositories Download.com and MacUpdate. According to Mac security site SecureMac, the infected programs include Bitcoin Ticker TTM, BitVanity, StealthBit and Litecoin Ticker (which, as the name suggests, tracks Litecoin rather than Bitcoin).