Stealthy Mac OS

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Q: Does enabling Stealth Mode on a Mac make it more secure? A: It does make it more secure but macOS is already so secure that it does not make much difference. macOS has a built in Application Firewall that cannot be turned off and is the defau. StealthGo VPN service is the best option if you have a Mac OS device such as a Macbook or iMac.

Our friends in Cupertino are at it again, according to our MacMole. This time Apple is finding new ways to get Macs into the workplace almost invisibly.

The StealthMac project has been ongoing for years – possibly even before Steve Jobs' return to Apple in late 1996. The team has taken different approaches over the years. Eight years ago, the big idea was to repackage existing Power Macs in boring beige cases that would look like run-of-the-mill Windows PCs.

Earliest Efforts

There are rumors of StealthMac PowerPC 603e-based prototype PCI cards from 1996 or so that included a 133 MHz CPU, 8 MB of RAM (expandable to 4 MB), an unnamed video chip with graphics support to 1024 x 768, and an IDE controller, since it required a Macintosh HFS+ partitioned hard drive. The back of the card had several ports: VGA, audio in and out, ethernet, ADB, and Mac serial.

As with DOS cards for the Mac, there was also a hydra video cable that connected to both the PC's VGA port and the StealthMac's VGA port. A similar cable was used for sound, and an internal IDE cable went to a dedicated Mac hard drive. Some later prototypes could use a notebook drive mounted directly to the StealthMac card.

These cards included stealth software that could run under Windows 3.1 or 95 to intercept keyboard and mouse input, determining whether keystrokes and mouse clicks should go to Windows or the Mac-on-a-card. A similar program allowed the StealthMac to read high-density Mac floppies in the PC's floppy drive. All in all, it was a very clever hack – and a bit of a kludge.

Another Direction

With the advent of the G3 CPU, Apple needed bigger heat sinks and put PCI card designs on the back burner. The new direction was building a complete Macintosh that could fit into a standard 5.25″ drive bay. By tapping power directly from the PC's power supply, the Mac-in-a-drive-bay had access to more power than a PCI slot normally provided.

It would be more correct to call this one a Stealth iMac, as it used almost exactly the same components as the original iMac. The CPU was clocked down to 166 MHz to avoid heat problems, and the USB ports were hidden behind what looked like a typical CD-ROM drive door.

Instead of external audio and video cables, the new design used a small PCI host adapter to channel the Mac's audio and video through the PC's hardware.

By this time Apple had come up with partitioning software and drivers that allowed the StealthMac to access a dedicated HFS+ partition on the host PC's hard drive. However, this tended to wreak havoc with the Windows installation. As before, it was easier to use a dedicated Mac hard drive – or at least install the StealthMac before installing Windows, which in many ways made adding StealthMac to an existing PC more trouble than it was worth.

At least it was possible to handle all I/O through Windows drivers and PC hardware this time.

One unanticipated development based on StealthMac technology was the Mac mini. Jobs used this as one way Apple could see some return on investment from the project, as it had already designed a Mac motherboard that was sufficiently small.

A Dead End?

A later approach took Apple's notebook technology and did everything it could to put a complete Macintosh (sans optical drive) in an external enclosure that looked like a run-of-the-mill 3.5″ external USB hard drive. The theory was that a Mac user could take the StealthMac to and from work, connect it to a USB or FireWire port, automatically run drivers from a small DOS partition, and Mac away.

The problem was USB itself. The external StealthMac would be accessed using VNC (Virtual Network Computing), but Apple wasn't yet ready to embrace USB 2.0, and FireWire never made big inroads on Windows. VNC worked over USB 1.1, which was a standard feature of all PCs at the time, but at high resolutions and high bit-depth, it bogged down the whole USB subsystem.

The biggest advantage of the external StealthMac is that it could have been used with any Windows PC with USB, and it would have been far more viable if Apple had been willing to embrace USB 2.0 earlier. In fact, thanks to VNC, the external StealthMac could have been used with any computer with a VNC client – Unix, Linux, Mac, etc.

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StealthMac X

PCI is on its last legs, while PCI-X and PCIe are not as well established, limiting the market for a Mac on an expansion card using one of the newer standards. Besides which, more and more Windows PCs are coming with less and less expansion slots to keep prices down in the very competitive low-end PC market.

The same goes for optical drive bays. Where expansion options are important for servers, high-end workstations, and power users, low-end PCs may not have an empty optical drive bay, reducing the market for that solution.