Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Question:

Question: Can you install System 7.5 using System 7 tidbits and disk tools?

Over 4 years ago, I bought a Macintosh LC that had a broken power supply. Got it working soon after I bought it but never really wanted to do anything with it until now.
I tried installing some software from the floppy disks that came with it but it says something along the lines of "cant open compressed files, install system correctly"

I went to reinstall system 7.5 from the disks that came with it but I realised I don't have the system 7.5 tidbits and disk tool floppy disks, however I do have the system 7.0 tidbits and disk tool floppy disks.
Could I possibly use the System 7.0 tidbits and disk tool floppy disks with the system 7.5 install disks?
Does system 7.5 even need the tidbits and disk tool floppy disks?
Also, would it be easier just to install system 7.0 onto it instead?


Thanks!

-Alex

Mac OS 8.6 or Earlier

Posted on

Reply
Question marked as Solved
Answer:
Answer:

A plain System 7.5 set of floppies ought to consist of something like seven (may possibly differ depending on language version) 1.44 MB Install disks (and some extra floppies, including Disk Tools). Is this not what you have? Do you have a special 7.5 version (such as floppy disks from a 7.5.3 download)?


A normal Install 1 disk would contain an Installer application. The Installer handles the unpacking of files on the following (six) disks. The procedure is to start the computer with Install 1 in the floppy drive, and then launch the installer. One can choose a Custom or an Easy Install. If Custom is chosen, it is possible to separately install things like a minimal system or a universal system for all Macs. One can also, for example, custom install the PC Exchange control panel for compatibility with PC-formatted floppies.

Posted on

Question marked as Helpful

Apr 23, 2018 1:30 PM in response to Alexy.C In response to Alexy.C

Yes, you would get exactly the same dialogue box if you as a mere test insert a PC-formatted floppy, providing that you do this after having started up with Extensions off (otherwise, the PC Exchange control panel would be active, making the disk appear with a PC icon on the Desktop). This means that the LC is not able to recognise the file system on the floppy. Unfortunately, in the case of the games floppy, it probably means that the disk is more or less damaged (perhaps somewhat/partly demagnetised). We cannot rule out that an attempt to read the floppy in another old Mac would be possible, though.

There’s more to the conversation

Read all replies

Page content loaded

Question marked as Solved

Apr 22, 2018 10:39 AM in response to Alexy.C In response to Alexy.C

A plain System 7.5 set of floppies ought to consist of something like seven (may possibly differ depending on language version) 1.44 MB Install disks (and some extra floppies, including Disk Tools). Is this not what you have? Do you have a special 7.5 version (such as floppy disks from a 7.5.3 download)?


A normal Install 1 disk would contain an Installer application. The Installer handles the unpacking of files on the following (six) disks. The procedure is to start the computer with Install 1 in the floppy drive, and then launch the installer. One can choose a Custom or an Easy Install. If Custom is chosen, it is possible to separately install things like a minimal system or a universal system for all Macs. One can also, for example, custom install the PC Exchange control panel for compatibility with PC-formatted floppies.

Apr 22, 2018 10:39 AM

Reply Helpful
Question marked as Helpful

Apr 23, 2018 8:32 AM in response to Alexy.C In response to Alexy.C

With access to all the seven floppies Install 1 to 7, you should be able to start up from Install 1 and carry out the installation. Try the Easy Install to begin with. If this does not work, please post back.

Apr 23, 2018 8:32 AM

Reply Helpful (1)

Apr 23, 2018 10:04 AM in response to Jan Hedlund In response to Jan Hedlund

System 7.5 installed successfully but I went to reinstall simcity 2000 and upon putting the floppy disk in, I get a dialogue box with the message "this disk is unreadable by this macintosh. Do you want to initialise the disk?"
However, doing this erases all info on the floppy disk. Any ways to sort this?

Apr 23, 2018 10:04 AM

Reply Helpful

Apr 23, 2018 11:33 AM in response to Alexy.C In response to Alexy.C

Glad to hear that the System 7.5 installation was successful.


First of all, in order to avoid any accidental and unwanted erasure, it is not a bad idea to lock (write-protect) the floppy. Old floppy disks can sometimes lose information. Alignment differences between floppy drives can also appear. Is it an original floppy, or has it later been copied (backup)? An 800K (2DD/DSDD) or 1.44 MB (HD) diskette? The same result with Extensions off (Shift key depressed at system startup)?

Apr 23, 2018 11:33 AM

Reply Helpful

Apr 23, 2018 11:29 AM in response to Jan Hedlund In response to Jan Hedlund

The floppy I'm trying to install SimCity 2000 with is the original floppy that came with the box for the game. It's a 3.5" 1.44mb floppy. The floppy disk worked fine a few years ago (when I first got the game) but now the mac refuses to read it. Also, it looks as if the little lock tab on the corner of the floppy is broken (its completely loose and doesn't lock into place) so I cannot write-protect it.

Apr 23, 2018 11:29 AM

Reply Helpful

Apr 23, 2018 12:22 PM in response to Alexy.C In response to Alexy.C

Try the usual things first. That is, resetting the PRAM (press the four keys Command, Option, P and R immediately at startup; hold down until a second startup tone has been heard), and later the aforementioned system startup with Extensions off. Try inserting the floppy several times.


Do you have access to Disk Copy 4.2 (http://download.info.apple.com/Apple_Support_Area/Apple_Software_Updates/English -North_American/Macintosh/Utilities/Disk_Copy/Disk_Copy_4.2.sea.bin)? If so, one could make an experiment. The idea is to try to read the floppy directly into an application. One would launch the Disk Copy 4.2 application (also known as Apple 3.5" Disk Duplicator, v4.2), then click on a Read Master Floppy button.


Post back if you need details about how to download, transfer and decode old Macintosh files. If yes, please let me know what you have to work with (such as other old Mac model with built-in floppy drive, PC with floppy drive, external USB floppy drive, etc).

Apr 23, 2018 12:22 PM

Reply Helpful

Apr 23, 2018 12:19 PM in response to Jan Hedlund In response to Jan Hedlund

Problem is, the dialogue box prevents me from interacting with anything else and the disk doesn't show up on the desktop so I cannot do anything with the disk whilst its in the macintosh. If needed, I can provide pictures of what happens when I try to insert the disk.

Apr 23, 2018 12:19 PM

Reply Helpful

Apr 23, 2018 12:34 PM in response to Alexy.C In response to Alexy.C

I mean to reset PRAM and then start up with the Shift key depressed, with an empty floppy drive. Only then, insert the floppy (repeatedly, if required). The idea behind the Disk Copy 4.2 experiment was to at least try to avoid a dialogue box in Finder.

Apr 23, 2018 12:34 PM

Reply Helpful
Question marked as Helpful

Apr 23, 2018 1:30 PM in response to Alexy.C In response to Alexy.C

Yes, you would get exactly the same dialogue box if you as a mere test insert a PC-formatted floppy, providing that you do this after having started up with Extensions off (otherwise, the PC Exchange control panel would be active, making the disk appear with a PC icon on the Desktop). This means that the LC is not able to recognise the file system on the floppy. Unfortunately, in the case of the games floppy, it probably means that the disk is more or less damaged (perhaps somewhat/partly demagnetised). We cannot rule out that an attempt to read the floppy in another old Mac would be possible, though.

Apr 23, 2018 1:30 PM

Reply Helpful (1)

Apr 23, 2018 1:29 PM in response to Jan Hedlund In response to Jan Hedlund

Aw that's a shame. Thanks for replying!
Hope you don't mind me asking one more question, but how do you run .sit files on system 7? I read that you need to use PC exchange but couldn't find a solid answer to my question.


Thanks again!

Apr 23, 2018 1:29 PM

Reply Helpful

Apr 23, 2018 2:29 PM in response to Alexy.C In response to Alexy.C

You need PC Exchange if you want to read PC-formatted floppies (for example, when downloading onto a modern PC or Mac, and transferring files on PC-formatted disks via an external USB floppy drive). If so keep downloaded Macintosh files encoded (.bin or .hqx) or possibly just compressed (such as .sit) until on the LC.


In order to decode MacBinary (.bin) or BinHex (.hqx) or to decompress StuffIt (.sit), you will need a ready-to-use freeware utility called StuffIt Expander (version 4.0.1 or 5.5).


Earlier, with access to a Windows PC (capable of running a DOS program) with a floppy drive, the following was an option:

Prepare an empty PC-formatted 1.44 MB diskette via FORMAT A: in DOS or the "full" formatting option under Windows. Download the MACDISK.EXE file from http://rrzs42.uni-regensburg.de/macintosh/files/macftp.html . Run the MACDISK.EXE (DOS) program on the Windows PC. Follow the instructions on screen. The result will be a Mac-formatted (sic!) floppy that can be used in a Macintosh computer. This floppy contains a Stuffit Expander installer.

Unfortunately, the web address does not appear to be active any more.

Generally speaking, archive.org can sometimes be useful when searching for information on older web pages.


If you have an Apple/Mac user group in your country/area, someone there might be able to help you with a working copy on floppy of StuffIt Expander 4.0.1 or 5.5.

User Groups - Apple

Apr 23, 2018 2:29 PM

Reply Helpful
User profile for user: Alexy.C

Question: Can you install System 7.5 using System 7 tidbits and disk tools?