Questions tagged [apple-macintosh]

For questions about Apple's Macintosh line of computers.

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46
votes
13answers
17k views

How was it back then in 1984, when the Apple II had color, and the new Macintosh didn't?

I imagine it being a huge downgrade for some, not to have color on the Macintosh. Macintosh games were black and white in the beginning, while Apple II had color. I'm especially interested in ...
5
votes
2answers
156 views

How to get out of Apple IIe mode on Macintosh Color Classic?

I just picked-up a Macintosh Color Classic with an Apple IIe card. I've never used one of these before but was able to get it to enter into Apple IIe mode. However, I cannot seem to figure out how to ...
4
votes
1answer
118 views

Why is my Macintosh LC 475 playing chimes of death when I install more ram?

I bought an LC 475 for parts and repair on ebay. When it arrived it seemed to work okay but the video was all stripey. After some diagnosing I spotted a rotten trace near the the VRAM simms. I ...
20
votes
4answers
2k views

How did 68k-based Macs (or other contemporary systems) detect how much RAM was installed?

If I upgraded, say, a Macintosh II with larger SIMMs, naturally the machine detected that additional RAM. But how did it perform that check? Does it simply sweep all addresses until it fails? Or ...
1
vote
2answers
473 views

Why did Steve Jobs say that Darwin is a kernel? [closed]

In this video, Steve Jobs introduces Mac OS X (in the year 2000), this is a snapshot from the video: He says that Darwin is the kernel for Mac OS X. Now the following is a diagram of the Mac OS X ...
66
votes
12answers
17k views

Did Apple not originally allow anyone to develop software for the Macintosh?

This probably nearly belongs on Skeptics.SE but here goes. Within the last few years I've become an Apple convert for the most part, which occasionally brings me into (usually) good natured conflict ...
12
votes
3answers
1k views

Apple II GS versus Mac Plus cost

I just came across a fascinating video https://www.youtube.com/watch?v=7h4tepFbMso&t=78s which makes a coherent case - I don't feel I can pass a final verdict on whether he's right or wrong, but a ...
12
votes
1answer
608 views

Was the Mac XL hardware different from the last versions of the Lisa?

The Lisa was a fairly impressive platform for the day. In comparison to the original Macintosh, the two did have different displays and aspect ratios but the Lisa also had additional hardware such as ...
8
votes
2answers
1k views

What was the first computer malware that could infect Mac systems?

The number of malware that can infect Mac computers has increased significantly last decade (2010-2019), particularly scams (including tech support scams) and fake anti-malware apps. since when ...
8
votes
1answer
1k views

Looking for a 90s Macintosh game

I'm trying to find an early to mid 90s Macintosh game. It was a side scrolling shooter in the style of R Type. You flew a spaceship that looked vaguely like the USS Enterprise from Star Trek, albeit ...
9
votes
2answers
2k views

Advice for heatsinking an old CPU

I’m refurbishing my middle school computer, a Macintosh Performa 635CD which has the Motorola 68LC040 processor. It is a 33 MHz chip. This era didn’t use any sort of heat spreader or heat sink, and ...
6
votes
2answers
399 views

Macintosh SE/30 cover screw size

I lost the 4 Torq (T15) screws that hold together the case for a Mac SE/30. Does anyone know the size and the groove spacing to order a compatible one? I found these on eBay, but I'm not sure about ...
2
votes
6answers
5k views

Were Mac systems faster than Windows in processing performance? [closed]

This could be due to Mac OS having performance optimizations to run on Mac hardware? As far as I know this has been happening since the first Mac from 1984 (128k) and the release of Windows 1.0 (1985)....
3
votes
1answer
211 views

How to work around the PRAM battery for a “Titanium” Powerbook G4

Years ago I was the original owner of a "Titanium" PowerBook G4. Eventually, the unit bricked itself and refused to power on. Some quick research at the time led me to believe the PRAM battery was ...
5
votes
1answer
271 views

Original Mac clock frequency

Why was the crystal clock frequency for the original Macintosh (128k,Plus, etc.) 15.667 MHz, instead of a multiple of 8 MHz (which was the maximum clock frequency for the speed grade of MC68000 ...
9
votes
2answers
1k views

What was the screen refresh rate of the Lisa and original Macintosh?

According to https://www.folklore.org/StoryView.py?project=Macintosh&story=Joining_Apple_Computer The Apple II displayed white text on a black background. I argued that to do graphics properly ...
2
votes
1answer
174 views

Mac SE tube won't come on?

My SE was working fine until I took it apart to clean it, and after reassembly the tube won't turn on, what could cause this? enter link description here
20
votes
2answers
2k views

What causes the traces to wrinkle like this and should I be worried

I have a Macintosh SE in my collection and I noticed these odd looking traces on the mainboard. Not quite sure what to think of it
6
votes
1answer
165 views

Was AppleTalk 422, 423, or something else entirely?

The Zilog SCC in the early Macs could operate in either 232 or 422 mode. AppleTalk used the later. 422 and 423 differed primarily in that the former used separate return lines for each data line, ...
8
votes
1answer
552 views

Will any serial mouse connect to Classic Macs?

The Macintosh 128k, 512k, and Plus use a DE-09 Serial port for the mouse. Is there some proprietary data-transfer method? Or is any DE-09 Serial mouse compatible? Furthermore: has anyone documented ...
2
votes
2answers
219 views

Non-obvious compatibility of M1297 monitor

I bought an Apple IIgs recently. I didn't do my research well enough and wound up with an M1297 monitor, which of course appears to only be compatible with Macintosh IIs and such, rather than the ...
5
votes
2answers
232 views

Dimensioned drawing of 64-pin SIMM?

I am looking for a dimensioned drawing of a 64-pin SIMM PCB like the ones used in the Macintosh II series for the ROM SIMM. I looked in Guide to the Macintosh Family Hardware and Designing Cards and ...
2
votes
1answer
340 views

Capacitor replacement on European 220 volt Mac 512K And Plus

I have had two Macs, a 512K and a Plus, in storage since they failed the smoke test in a spectacular manner a few years back. I have finally learned how to solder and de-solder, so I think its time to ...
1
vote
1answer
284 views

How much time does a Mac SE/30 with 128 MB of memory take for its power-on memory test?

I've read that it should be possible to push the SE/30 to its maximum RAM capacity with eight pieces of 16 MByte, 30-Pin SIMMs. I've never seen such a machine in the wild. Neither with 64 or 80 MB. ...
3
votes
2answers
312 views

When and why would MacinTalk say “open-apple hold”?

I'm trying to confirm a vague recollection about the text-to-speech PlainTalk / MacinTalk software shipped with Macintosh computers. If my memory is right, this would have been around 1994, and based ...
7
votes
2answers
440 views

What was the Macintosh's BOM cost?

Andy Hertzfeld revealed that the CPU for the original $2495 Macintosh cost just $9.00. How much did the rest of the computer cost? Was the markup really greater than Pepsi's markup on sugar? How much ...
9
votes
1answer
302 views

Mac Plus flyback transformer replacements

The short: How can I tell which flyback transformers would work for a 9" Macintosh? The long: I've soldered on flyback transformers on old Macs that have gone bad in the past, but when my Mac Plus ...
13
votes
2answers
1k views

What was the design of the Macintosh II's MMU replacement?

I am in the process of repairing a Macintosh II and trying to understand the design rationale behind Apple's MMU replacement part installed in this machine. As you can see in the picture, there is a ...
5
votes
2answers
430 views

Was Apple's Developer Release DR1 of Copland ever distributed?

From 1994 to 1996 Apple developed a complete new Mac OS, codenamed Copland, intended to be published as System 8. A first public demo was made at the May 1996 WWDC. Shortly before it was canceled, a ...
16
votes
4answers
5k views

Why did 3.5" floppies win (and not another size)?

It's an open question whether desktops would've kept using 5.25" until the end of the floppy era, but laptops meant something smaller was going to be introduced; that much was essentially ...
24
votes
3answers
2k views

Linux 68k Macintosh emulator

I'm currently using the absolutely ancient "Fusion" emulator to emulate a 68k Macintosh (specifically, a Quadra 700), but it only runs under MS-DOS, so I'm using a VirtualBox VM to emulate that. I'd ...
5
votes
1answer
356 views

Is is possible to repair a SE/30 with reversed C2 and C11 capacitors?

Shamelessly stolen from BobDenford on Reddit. I recapped my SE/30 but mistakenly reversed the polarity of the two axial capacitors (C2 and C11). Prior to my error, the machine was fully functional ...
3
votes
2answers
559 views

AppleTalk adapters to bridge LocalTalk to Ethernet?

What AppleTalk adapters can bridge LocalTalk to Ethernet? There are some adapter that allow LocalTalk printers to show up on ethernet, but I want to allow computers to talk. My IIgs has LocalTalk but ...
16
votes
4answers
788 views

A good method for formatting a modern device in HFS (Not HFS+)

I started this project ages ago and it's just been sitting on my bench for ever. I have this old MacIIci and I put a LAN card in it, maxed out the memory, has the turbo proc in it. The next step I ...
2
votes
1answer
804 views

How to read old 3.5" Macintosh formatted floppies on a MacBookPro

I have connected a USB external floppy drive to my Macbook Pro (OSX El Capitan). I am unable to "view" the external drive, and hence unable to access the floppy content. I have inserted a floppy, ...
8
votes
2answers
653 views

Why did some Mac computers have two names?

Many, if not all of the Performa and Quadra systems seemed to have two names. For example the LC 475 was also known as the Quadra 605.
23
votes
1answer
4k views

Why do all the Speech Synthesizers have that same Voice?

The first time I ever played with software speech synthesis on a microcomputer (not hardware synthesis, like in TI's Speak & Spell) was around 1983, using S.A.M for the Commodore 64. A year later,...
12
votes
1answer
507 views

How are File Timestamps recorded in classic Mac OS?

When I save a file it has a 'Created At' and 'Updated At' Value saved as well. I would like to know HOW these values are saved? Are they saved as an integer representing a number of seconds since 1904?...
5
votes
2answers
395 views

Tools for creating disk images on Mac Plus

I got BMOW's floppy emulator and have been pulling a bunch of files from 30 year old floppies (which have a miraculously low rate of failure) onto my SD card. One of the things I wanted to copy was a ...
9
votes
1answer
476 views

What exactly did Sony contribute to the original Apple PowerBook?

The first Apple PowerBook laptops were delivered in 3 versions in 1991: PowerBook 100, 140, and 170. These initial PowerBooks were overall a tremendous commercial success for Apple, and are regarded ...
49
votes
10answers
9k views

Why was preemptive multitasking so slow in coming to consumer OS's?

Preemptive (rather than cooperative) multitasking was a highly-touted feature for PC's in 1996, with its inclusion in Windows 95 for the first time. It was also highly-touted for 2001 Macs when ...
6
votes
2answers
621 views

What is the highest version of System 7 that can be run on a Mac SE/30?

My recently restored Mac SE/30 has System 7.0 running on it at present, booting from an original SCSI HDD. I’m missing a few key features, like disk image mounting, which I understand were added in ...
6
votes
3answers
494 views

How can I debug a Mac OS Classic application?

I have a Mac OS Classic application (a game) that I want to "debug". It has data files in a unique format than I am attempting to reverse-engineer. I've made some progress with a hex editor, but ...
28
votes
6answers
9k views

How did the early Macintosh computers update the display?

This question is about the Macintosh 128k, but if you can give an answer which describes one of the other very similar machines, that's good too. The bitmap was 512 by 384 pixels. Assuming that one ...
17
votes
5answers
2k views

Was 1991's Hellcats the first instance of incremental screen updates?

In case you have never seen it, 1991's Hellcats was a seminal release on the Mac. It ran at full 8-bit color and could, on a newish machine, drive three 1024x768 screens at the same time. Nothing on ...
5
votes
1answer
239 views

Macintosh System 6 on Quadra?

System 6 is not officially supported on 68040 Macintoshes, but has anyone successfully run System 6 on an early Quadra, e.g. the Quadra 700?
7
votes
1answer
1k views

How to install System 7.5.5 on a Macintosh SE/30 using floppies?

I have a Macintosh SE/30 with a formatted Disk. I'd like to install the latest System 7 on it that will run. According to Wikipedia that should be 7.5.5. According to several sources Apple has made it ...
1
vote
1answer
398 views

What happened to the Apple Device SBC that was supposed to compete with the linux SBCs? [closed]

I am not sure if this question is "on topic" or not, but I'm asking it anyway... I was reading Hackaday.com a few months ago and I came across this article: https://hackaday.com/2016/04/01/apple-...
9
votes
3answers
1k views

To wash or not to wash a Mac SE/30

I have a Macintosh SE/30 that I'm trying to bring back to life. When I power it on, I get the dreaded horizontal stripes. Or, zebra stripes. Also called Simasimac. I have re-seated all of the ...
6
votes
2answers
1k views

Macintosh LC II power supply clicking

I have a Macintosh LC II that I just acquired. When I attempted to power it on, I got nothing. No tones, no LED, no fan...nothing. I took out the power supply and tried to measure any voltage ...