Earlier today in the Apple Macintosh Enthusiasts Facebook group, Charles Lott asked if an OS X Mac with a USB floppy drive could write disks that a Mac running System 7 could use. The short answer is, it depends.
2001 – Packaged in a plain beige case with a single DA-15 connector, this single-sided 400K floppy drive (model #M130) works with early Macintosh computers. The “Click of Death” likely occurs on drives that have not been adequately dusted or as a secondary result of restoration by the liberal application of lubricant.
Introduced to replace the Mac 128K in September 1984, the 512K had four times the RAM of the original Mac. This made it possible to work with larger files, more powerful software, and have more files open (running more than one application was still in the future, awaiting MultiFinder).
Introduced in January 1984 (along with a revised Lisa), this Macintosh didn’t have a model number – it was simply the Macintosh. There was no name on the front. Early 128Ks simply said Macintosh on the back, while later ones were marked Macintosh 128K to distinguish them from the later Macintosh 512K.