The original Plus came in Apple beige during 1987 the case color was changed to platinum, the same color used for almost all post-1986 desktop Macs until the iMac arrived in 1998 (there were a couple black Macs). The Plus does not support high density floppies, but it can be used with an external high density floppy drive as long as the disks used are 800K floppies. The SCSI bus on the Mac Plus is officially rated at 1.25 MBps/10 Mbps by Apple, although real world testing shows it to be barely over 0.26 MBps/2.1 Mbps – which is still 4x the speed of Apple’s earlier floppy port hard drive. Not only was 1 MB more RAM than PC-class machines could handle, but the Plus could be expanded to 4 MB total RAM! (Earlier Macs came with a fixed amount of memory with no upgrade path.) Introduced in January 1986, two years after the original Macintosh, the Mac Plus shipped with 1 MB of RAM, a new double-sided 800 KB floppy drive, and a built-in SCSI port (the first Mac so equipped).
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