It’s been almost two years since I last wrote for Low End Mac, but my love of all things Apple hasn’t waned. Most recently, I’ve become the proud owner of an iPhone 3G, which may finally stop me hunting for an elusive MessagePad 2100 on eBay.
What did interrupt my Classic Mac activities was a number of hard drive issues that required multiple reinstalls of various versions of the Mac OS on different machines. It was more of a hassle than a problem, but it became a serious sticking point once I upgraded to Leopard.
A beige Mac with a Super Drive floppy drive, or an older Mac with a 400k or 800k drive. A valid bootable system for your early Mac, in the form of a 400k MFS disk image file. A blank or erasable single-sided or double-sided non-HD floppy disk, formatted (any, including non-Mac formats) or unformatted. They have a built-in SuperDrive floppy drive, capable of working with 400k, 800k, and 1.4 MB Mac floppies, and (with proper OS support) floppy disks from other platforms. They can run off of OS 7.6.1, so that MFS floppies (usually 400k) can be read.
In order to keep our classic Macs alive, we need ready access to boot disks and install disks so that when the need arises they can be recovered. Apple very kindly makes various versions available for free – most notably System 6.0.8 and 7.5.3. You can also find useful items in their archive, such as the 7.5 Network access disk, which allows you to boot into System 7 from a floppy.
Depending on the file format, preparing these boot disk follows various routes, but most of them rely heavily on one of the following three items:
And herein lies the problem: Multiple .smi files need to be copied to one location – in other words, you should be able to boot the Mac you want to install them on. So before installing the Mac OS from .smi files, you need to make a boot disk using one of the other two methods.
But both Disk Copy and .sea files require the Classic Mac OS. Earlier this year, I found myself with three old Macs, none of which would boot, and a G5 with Mac OS X 10.5 Leopard installed that was seemingly useless for this task without the Classic environment.
Rhino 6 for Mac and Windows. Rhino 6 for Mac and Rhino 6 for Windows are nearly the same. Check out the differences. Rhino At The Core. The Industry Standard NURBS engine continues to evolve on macOS. Right At Home. A native application that feels. Click on the link Download Rhino 5 for Mac Evaluation. This will start the download process. It will take a few minutes depending on the speed of your Internet connection. Make note of the file name being downloaded. It will look like: Rhinoceros5.x.dmg and be about 200 MB in size. Rhino for Mac Free Download is an authoritative software for the design and exhibiting 3D objects. Rhinoceros is designed not only for consistent users or students but also for engineers and designers, CAD/CAM/CAE. Associations essentials of CAD programs with up-to-date technology NURBS. Rhino for mac 5. Topics related to Rhino for Mac. Tutorials This category contains Rhino for Mac tutorials. Hardware Since we can’t test every possible hardware combination, this is the place to get hardware recommendations from other users. A FREE update for Rhino 5 for Mac is now available. What’s New in 5.4: Grasshopper (beta) included PanelingTools added Selection commands added: Lasso, SelBoundary, SelBox, SelBrush, etc More control over Rhino’s Preferences 4View and SelBlockInstanceNamed commands added Better SketchUp (skp), IGES, dxf, ply, and Collada (dae) file compatibility Numerous refinements to the Layout user interface Localization and translation updates Improved support for macOS High Sierra Plugin.
All was not lost due to one simple fact – Mac OS X is a Unix variant, and therefore it has all of the standard Unix tools available. One of these can be used to make boot disks. The dd command can be used to duplicate any disk, and it can be used to take a disk image file and write it to a floppy disk byte by byte. The format of the command’s usage is fairly straightforward:
Where you would replace INPUTFILE with the filename (and path) of the disk image and OUTPUTFILE needs to point to the destination (a floppy disk in our case). At least, it should be that simple, but it isn’t quite. Some extra parameters are needed when dealing with Mac Disk Copy images, because there is some extra information in the header of these files that we want to strip out. The command for creating a Mac boot disk is:
This seems simple enough, but you need to know a bit of Unix to get the paths correct. For example, if the image is system7.img and it’s in your home folder, you need to replace INPUTFILE with ~/system7.img. But how do you point OUTPUTFILE to the floppy disk? When Mac OS X mounts a floppy disk called DISKNAME, it creates a location for it at /Volumes/DISKNAME, but if you try to use this with the dd command, you will get an error.
If you have a floppy disk mounted, go to Terminal and type the command df -h. You’ll see your disk listed, but the field of interest is the first column – it will probably say something like /dev/disk1 – and that is the correct value for OUTPUTFILE.
But you’ll hit problems again. If you try to run this, you’ll be told that the device is busy. The trick is to unmount the contents of the floppy disk whilst you still have the disk itself mounted. Sounds confusing? It is – but this is the magic step which seems to be missed from many discussions about using dd.
After that little tour of the dd command on OS X, here are the step by step instructions for creating a bootable floppy disk from OS X. As ever when using the command line, be careful what you type – it’s all too easy to make mistakes via a typo!
The process is a bit fiddly, but you soon get used to it. What it means is that Mac users are no longer reliant on having two working classic Macs at home (so one can be used to help recover the other) – any OS X machine with a USB floppy drive should be up to the task. I’ve managed to Boot Macs into System 6 and 7 this way – and I’ve even made an A/UX boot disk . . . but that’s another article for another day.
Keywords: #macbootfloppies #macfloppiesinosx #classicmacos
Short link: http://goo.gl/EAnufG