bluefever
Level 1 (0 points)

Q: Mac Plus ?

I just bought a Mac Plus when I start it up it beeps and then goes to the screen with a disk with a question mark. I bought a set of disks that are supposed to have the operating system on it they say Macintosh and Install. The Disk is a high density 400k/800k. It seems to read it for a couple seconds and spits it back out.

Posted on Jan 7, 2015 11:44 AM

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bluefever

Q: Mac Plus ?

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  • by Sparkleberry,

    Sparkleberry Sparkleberry Jan 7, 2015 12:15 PM in response to bluefever
    Level 4 (3,115 points)
    Notebooks
    Jan 7, 2015 12:15 PM in response to bluefever

    See a thread from two years ago that has reply by dalstott and links to older OS.

     

    Macintosh Plus: not starting up.

  • by bluefever,

    bluefever bluefever Jan 7, 2015 7:17 PM in response to Sparkleberry
    Level 1 (0 points)
    Jan 7, 2015 7:17 PM in response to Sparkleberry

    I don't have the external hard drive. The back of the disk's say Ver. 7.1.20150107_221141.jpg20150107_221157.jpg20150107_221207.jpg

  • by Jan Hedlund,

    Jan Hedlund Jan Hedlund Jan 8, 2015 2:19 AM in response to bluefever
    Level 6 (9,901 points)
    Jan 8, 2015 2:19 AM in response to bluefever

    These diskettes are High Density (HD), as you mentioned in your original message. However, the icon means that disks cannot be used in older 400K/800K floppy drives.

     

    The Macintosh Plus can only handle up to 800K. Such diskettes are 2DD/DSDD (two-sided, double density). 1.44 MB HD diskettes (as in the case of the System 7.1 shown in the pictures) are not compatible.

     

    System 7.1 as such would be OK for the Macintosh Plus (if it has at least 2 MB of RAM), but the installation/transfer then has to be carried out using another older (pre-1998) Macintosh computer (with a 1.44 MB floppy drive) as an intermediary. Also, in order to install at all, an external hard drive would be required for the Macintosh Plus.

     

    Otherwise, you have to run the Macintosh Plus directly from a system on a floppy disk in the floppy drive. In that case an operating system such as 6.0.3 would be suitable (1 MB of RAM). It is possible to swap floppies in order to use programs on other disks, but this is slow. An external hard drive is recommended.

     

    System 6.x.x and System 7.0 were available on 800K (2DD/DSDD) disks.

     

    See the technical specifications below for all supported systems:

    http://support.apple.com/kb/sp190

     

    Jan