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Can i install System 7.5 on Classic II ?

Is there any way of installing System 7.5 on the Classic II, i swear ive seen someone on youtube running it (or maybe i dreamt it) i can upgrade to 10mb ram if i need to, it currently has 4mb. Also Where the hell would i get the floppy disks from? Has anyone been successful in doing so?

 
The Classic II is officially supported by System 7.5, so it should be a simple matter of getting the floppies and running the installer.

The minimum requirement for RAM is 2 MB, so 4 MB, while quite crampped, should be enough for a basic install. Upgrading to 10 MB is strongly advised, though, if you want decent performance.

c

 
I had OS 7.6.1 running on mine, but it was horribly slow even with 10 MiB RAM. I am fairly certain that 7.1 is the best OS for such an underpowered Mac—seriously, it’s a sluggish 16 MHz machine with a crippled, half-width memory bus. 7.1.x can do almost everything 7.5.x can do with the right system extensions added on, and is a heck of a lot more performant, especially with constrained system resources.

 
Yes,

But I prefer system 7.0.1 on mine, ...I figure if the machine is vintage there is little sense in trying to get it to be modern.   ;)

 
Classic II will run 7.5 just fine. Hell even the old SE and Plus will run it if you have them upgraded to 4mb of ram. But truth be told, the Classic II is a bastardised low budget model version of the SE/30 with hardware limitations that compromise it's speed. If you want a better 7.5/7.6 experience, you'll need an SE/30. Otherwise, a Classic II probably runs best with 7.1.1 or lower. :p

 
the Classic II is a bastardised low budget model version of the SE/30 with hardware limitations that compromise it's speed. If you want a better 7.5/7.6 experience, you'll need an SE/30. Otherwise, a Classic II probably runs best with 7.1.1 or lower.  :p

+1

 
There's a non PowerPC version of 7.1.2? I had initially thought it was PowerPC only. But there's a version that came out for the Quadra 630 appearently. Will it run on an SE and where would I find it? :p

 
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Yes, there is indeed a non-PowerPC version of 7.1.2 and it will run on any 68k system that can support an install of 7.1.1. You need to install 7.1.1 (System 7 Pro), then perform an in-place upgrade. You can find both on the Apple Legacy Software Recovery CD.

 
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Uni, 6.0.8L definitely appeals to me too on a Classic II, particularly with 2MB of RAM.
2mb or RAM? ...you need to up that.  My Classic II has 10mb or RAM and runs really nicely with it.

 
So i got hold of the instal images and made the floppies but the installation keeps failing during after switching from disk 3 to 4 it writes the control panel files from disk 4 and then asks for disk 1 and after that says failed to install. does the same thing on 7.5 and 7.5.3. any ideas? I've also tried different custom install settings. did you guys have any issues installing?

 
My Classic II has System 7.5.3 but it is horribly slow and it takes up a lot of RAM Space.

But the problem is this: System 7.5 installs a lot of junk into the System/Finder, even if you install it as "For this Mac Only". It will add PowerPC Code into it making it a "FAT" system (a system with both 68K and PPC code in it). You need a FAT or PowerPC/68K stripper program and remove the PowerPC crap from the system (AND Applications too!). This does 2 things:

1) It shrinks the size of the System/Finder saving you RAM and Hard Drive space.

2) The smaller sized system runs much faster on the Mac as it takes less RAM.

3) Because of 2 - things load faster too. So your Boot Time is quicker. Plus you have more room on your hard drive.

Another problem, even when you install as "For This Mac Only", some things still get loaded that are not needed. But you need to be a Resource Edit Expert to get to this point...

Make a back up of the System/Finder and use ResEdit to see what I mean. If you open up certain image, dialog and code resources, you will find things in there for Color Macs and even for the MacTV. Most color images you can remove, as with some dialogs are meant for color macs only. Code resources you need to know what you are removing. Some things are clearly labeled, many are not. If you can figure out what needs to be surgically removed try it on the back up.

If you do a proper job, you can get a bloated System down to a neat trimmed system and then it will run. I did this before with my Mac IIcx/ci's and they run like somebody set their tails on fire! Also on my SE\30. The Systems (and most of the apps) on these machines are tiny - because all of this boated material was removed.

 
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