Broadcom BCM5780 Mid-and-South Bridges (PCIe Power Mac G5)

When the Dual-Core PowerPC 970MP third-generation G5 CPUs came out in Mid-2005, Apple had to start using a brand new Mid Bridge chip for the Macs along with it. Since the AMD 8131 only had PCI-X bridges and no PCIe bus, they couldn’t keep the old chip, replacing it with the BCM5780. (Above: Block diagram […]

AMD-8131 PCI-X Midbridge Chip (2003-05 PCI-X Power Mac G5 only)

Have you ever wondered why there’s an AMD chip on the back of your Power Mac G5’s logic board, or what it’s even doing there? For higher end Mid-2003 thru Early 2005 Power Mac G5s, that’s the PCI-X “Mid Bridge” chip. This is what handles all your expansion cards! Although, it doesn’t appear in Late-2005 […]

IBM CPC945 Northbridge chip tech specs (Late 2005 Macs)

The IBM CPC945 is a redesigned Northbridge chip mostly for the Dual-Core PowerPC 970MP CPU. It has technical upgrades over the IBM CPC925, including a faster HyperTransport Bus. It’s also capable of talking to the PowerPC 970fx second-generation G5 chip, which means it may be found in other Late 2005 Macs on the logic board. […]

“Loki” XCPU Tech Specs: The IBM PowerPC chip for the Xbox 360

While not at all an Apple product, the Xbox 360 shares some strikingly close DNA to Apple computers of the mid-2000s. Namely, the IBM PowerPC chip which powers the Xbox at its core. This chip was announced on July 7th, 2005 in Tokyo, at the Power Everywhere forum, alongside the third-generation G5 chip, the 970MP. […]

Memoirs of some recent work in PS CS4 on the Power Mac G5

It’s a combination of factors that keep me going on this platform: muscle memory, learned skill, perceived ease of use, having an excuse to keep a decades-old platform going.. the list goes on. Everything that went into this 2003 Dual 2.0 Power Mac G5 I use on a near-daily basis, ends up helping me make […]

According to late 2000s concept art, this was the future

Does anyone remember a time in the late 2000s, when there was tons of futuristic-looking concept art about future tech? Especially after the original iPhone came out, there were many mockups of sleek and/or touch-first types of devices. I know I have an iPod Chimera somewhere.. found it. . (Above: The 2010 iPod Chimera, Artist: […]

Metal 4: An overview

Metal is the current generation of low-level graphical API that Apple uses, which powers the hardware accelerated graphics on their OSes, namely macOS. Metal 1.0 was introduced on September 30th, 2015, alongside Mac OS X El Capitan and iOS 8. Before the Apple Silicon transition, the Metal API received regular major updates every 2 years. […]

So how much power does a Power Mac G5 really use?

What started as an exercise to definitively answer the power consumption levels of a Power Mac G5, turned into some fascinating insights about the way I use electricity at home. Seeing the real-world numbers from a G5 was amusing, but what was truly eye-opening were the more modern devices I had around me and how […]

macOS Tahoe Beta 4 is out: Build 25A5316i

On July 22nd 2025, Apple released the 4th Developer Beta of macOS 26 Tahoe, which is shaping up to be the potential Public Beta build anytime soon. It looks like the UI received further refinement, and the glimmer of glass-transparency effects has returned a little. Beta 3 before updating After update, before switching dark mode […]

Maximizing an AGP Power Mac G5 into space and beyond: 2025 Edition

The 2003 Power Mac G5 was the first in a line of controversial 64-Bit PowerPC Macs, which suffered from above average hardware failures. While not the most popular Mac in the lineup of PowerPC Macs overall, the Power Mac G5 still packs a punch. . . Unfortunately, in addition to sometimes defective hardware, the Power […]

Early Demos (Finder, SoundLab, Scroll Bar Demo, WindowManager, IconEditor)

Here’s a write-up about another fascinating Twiggy disc. It contains several early demos that are also mentioned in Andy’s book and on his website, Folklore.org. . The disc boots into Finder 2.0 (25-Jul-82). I think the most interesting early demo was an early prototype for the Finder, written by Bruce Horn and myself in the […]

Fonts Before Mac (1983)

Elefont was the initial name for the bitmap typeface designed by Susan Kare in 1983 for the Apple Macintosh’s operating system. It was later renamed Chicago after Steve Jobs suggested naming fonts after “world-class cities” rather than suburban Philadelphia train stops, which Kare and her colleague Andy Hertzfeld had initially used. The name “Elefont” was […]

Say hello to our newest Contributor, Janez J Starc

Today, Low End Mac gains a new contributor, someone who will write his own articles on our very website – say hello to Janez J. Starc! An avid enthusiast for vintage Macs, Janez has written interesting articles about Twiggy Mac software (and many other things) on the 68kmla forums as well as tinkerdifferent. Along with […]

Imagine it: macOS Tahoe on a PowerBook G3 Wallstreet

The imagination is a powerful thing, isn’t it? What would it look like if for some inexplicable reason, there was PowerPC OCLP? Today, through the combined forces of Apple Silicon, Photoshop, a Wallstreet Book and a G5, the imagination lives. . . Generations apart . The Screenshots In Conclusion This was a fun side project, […]

All the new macOS Tahoe Beta 3 landscape wallpapers

When you navigate to the system settings app in Beta 3 of macOS Tahoe, there are 12 new nature themed wallpapers, including what appears to be the new default wallpaper. These make beautiful additions to any desktop, and have been scaled down (in size and resolution) to work better on older Macs. Download: Tahoe_Landscape_Wallpaers.Zip (Google […]

Apple Silicon – “Apple A1” S5L8900 chip specs

This page details the full hardware profile of the Apple Silicon “A1” Samsung S5L8900 chip.   Name: “Apple A1” MFG: Samsung Released: June 29th, 2007 Codename: APL0098 Part Number: S5L8900 Fabrication Process: 90-Nanometer Transistor Count: ~125 Million CPU ISA: ARMv6 (32-Bit) . RAM Information: Memory Bus Width: 16-Bit Total channels: 1 Bit per channel: 16-Bit […]

Display Evolution with Macs (both creation and consumption): What’s Next?

With Mark Sokolovsky’s recent article, HDMI 2.2 is out: 16K at 60Hz, 96 Gbps, and more it’s clear there has been quite the evolution over the years with the HDMI standard.  The same can be said with DisplayPort, as version 2.0/2.1 has already arrived providing approximately 80 Gbps of video bandwidth and is found on […]

Apple Silicon – A18 Pro chip specs

This page details the full hardware profile of the Apple Silicon A18 Pro chip.   Name: A18 Pro Released: September 9th, 2024 Codename: APL1V07 Part Number: T8140 Fabrication Process: TSMC’s 3-Nanometer Transistor Count: 20-Billion CPU ISA: ARMv9.2-A . . Memory Bus Width: 64-Bit Total channels: 4 Bit per channel: 16-Bit Memory Type: LPDDR5X-7500 3750 Mhz […]

macOS Mojave 10.14

They say when you come to the dark side you get cookies, but in the world of technology you get a brand new version of macOS. This was the first version of macOS to use Dark Mode, after all, but the murky truth lays underneath. This was the final version of macOS to be able […]

A new, state-sponsored macOS malware: NimDoor

Be on the lookout for any suspicious-seeming zoom links or software update SDK “downloads” via Zoom, too. While DPRK state actors are targeting Web3 startups and crypto, it’s still better to exercise caution. Their tactics rely on social engineering for it to work, but the rest is actually a bit complex. . . An Executive […]