It's been almost exactly nine years (wow!) since I last ventured into the land of Hackintoshes, or homebuilt PCs that can run macOS.
Back then, I built and used one, then wrote about the machine for Macworld, and they even lab tested it, where it held its own against real Macs costing much more.
Fast forward to 2017, and I've decided to tackle the project again. Why? Oddly, because there is a new Mac Pro coming, but it's a ways away. I want something I can use in the interim, without spending a huge amount of money on. When the new Mac Pro ships—assuming it's not an enhanced trash can design—I plan on upgrading, and the homebuilt Mac will become a gaming PC.
As I'm not writing about the project for Macworld this time around, I'm going to document things here on the blog as I go along. In today's installment, I cover the first steps in the process: online resources and parts decisions.
After I posted this, Brad Oliver contacted me on Twitter about the frame rates for DiRT Rally—he commented that the fact that they were clustered around 60fps made him think I'd left vertical sync (Vsync) on…and he was right. I've updated that section with the modified results, as well as one additional comparison I forgot to include the first time.
Oh, and in case you don't know Brad…he was directly involved in porting DiRT Rally to the Mac for Feral, so he knows his stuff! Thanks Brad!
In part one of the comparison between my old and new iMacs, I provided a brief overview of the new machine, tech specs for both, and a number of benchmarks. (I also tested the video card against a Windows GeForce GTX 1080, and posted a slide-over image that demonstrates the wider color gamut on the new Mac.)
In today's second (and final) part, I'll take a look at video processing performance (via iMovie), how well the new iMac handles gaming, and then wrap up the whole series.
My 2019 iMac has the new AMD Pro Vega 48 video card, the fastest video card Apple has offered in a (non-Pro) iMac. But just how fast is it? I'll have more to say about it in an upcoming "games shootout" with my 2014 iMac, but I was also curious as to how (badly) it might compare to the video card—an NVIDIA GeForce GTX 1080—in my 2017 Frankenmac.
While I'd love to be able to compare the performance under macOS on Frankenmac, that's not possible as I uninstalled it a while back—I'd been unable to update to Mojave due to a lack of NVIDIA drivers for Mojave. (Which is related to all of this, in that you cannot use an NVIDIA card—with acceleration—in Mojave, even in an external GPU box, because it seems Apple and NVIDIA aren't on speaking terms right now.)
However, because a number of the benchmark apps I used in my 2019 iMac vs 2014 iMac—Part One comparison test also run on Windows, I was able to do some head-to-head testing, even if the difference in the OS adds a layer of unknown to the results.
Going in, I was pretty sure I knew what the results would show: The Windows PC was going to crush the iMac in anything graphically related, but lose in the CPU tests. While the AMD card is a big step up from previous-generation iMacs, it's nowhere near bleeding edge—it's more like "minor scrape" edge—in the Windows world.
Anyway, I ran a bunch of tests, and the results were pretty much as I expected…
My main machine is a late 2014 27" iMac with a 4GHz Core i7 CPU, 24GB of RAM, and a 256GB SSD (plus a big external RAID for most of my files). While it runs fine, I would like something with Thunderbolt 3 support, with faster graphics for X-Plane, and with more computing power for ripping Blu-Ray discs. It's also beyond AppleCare age, and if something fails, it will be expensive and time consuming to repair.
When the iMac Pro came out, I was intrigued, but the price point is scary high and there was the "new new" Mac Pro on the horizon—potentially a cheaper alternative, given the display wouldn't have to be bundled (and upgradeability is a good thing). I was hoping for an update on that machine at WWDC this June. Instead, we got the update much earlier, though it's not was I was hoping to hear: The new new Mac Pro won't be released in 2018.
As a result, if I want to replace my iMac this year, I have only two choices: A new iMac non-pro, or a new iMac Pro. (In theory, I could look at a MacBook Pro with an eGPU for graphics, but I despise the Touch Bar, and that's the only way to get the highest-spec MacBook Pro. But I really want a desktop Mac, not a laptop-as-desktop Mac.)
So just what would I be getting for my money with either machine? And how do those machines compare with the Frankenmac homebuilt I put together last year? And perhaps more intriguingly, how do they compare with the 2013 "new" Mac Pro that Apple still sells today?
To answer those questions, I turned to the Geekbench 4 benchmark app, which includes both CPU and graphics (they call it Compute) benchmark tools.
I wanted to install Linux on a hard drive in Frankenmac, as Clover is a multi-boot utility—it lets you choose from any OS it sees during power up. (I'll add Windows, too, eventually.) To do this, you need to get Linux onto a USB stick. I've done this in the past, and my vague recollection of the process was download the ISO, convert to an image file, write image file to USB stick. However, as it'd been a few years, I went searching for references to make sure I had all the commands correct.
I found a lot of pages with a general summary of the process, and few with the specific steps. I tried one of those, but my USB stick didn't work. The other specific pages contained the same basic process, so I was stuck. Until I found this page, which contained a critical step I was missing: Formatting the USB stick before copying the image file.
For future reference, here's the precise process to follow if you want to burn an ISO file onto a USB stick…
As part of my research into Frankenmac, my homebuilt Mac clone, I stumbled across this page at Intel that lets you easily compare CPUs across generations. Just click the Processors button, then choose a family (Desktop), then choose a CPU family (7th Generation Intel Core i7).
Click directly on a processor's name to go to its data sheet, or click the Compare box to add it to a comparison. Select as many as you like; the final layout includes horizontal scrolling to display those that don't fit onscreen at first.
I found this site useful when selecting a CPU for Frankenmac. Comparing the 6th and 7th generation Core i7, for example, the 7th generation has a slightly faster clock speed, faster RAM, and support for Intel Optane memory, whatever that might be. Based on these mild differences, and on Apple not yet shipping a Mac with the 7th generation chip in it, I chose the 6th generation Core i7 for Frankenmac.
Taking a break from the recent Frankenmac posts, here's a little trick for creating "Time Machine like" backups of anything you'd care to back up1I don't know how well this might work for Mac files, as opposed to Unix files. But Mac files can be saved to the real Time Machine.. In my case, it's the HTML files off of my web sites, both personal and work. I used to simply back these up, but then realized it'd be better to have versions rather than totally overwriting the backup each day (which is what I had been doing).
Once you've got it set up and working, you'll have a folder structure similar to the one at right, with one folder for each backup, and a "current" link that takes you to the newest backup.
I get zero credit for this one; my buddy James explained that he'd been using this method for a year without any troubles, and pointed me to this great guide2The original site that hosted this script is gone; I've linked to a copy I found on archive.org. Original URL:
https://blog.interlinked.org/tutorials/rsync_time_machine.html that explains the process.
I used that guide and added the following to my backup script to create my own customized Time Machine for the files from here, robservatory.com:
/usr/local/bin/rsync -aP \
--link-dest=/path/to/quasi/TM_backup/current user@host:/path/to/files/on/server/ \
--exclude "errors.csv" \
--delete --delete-excluded \
rm -f /path/to/quasi/TM_backup/current
ln -s /path/to/quasi/TM_backup/back-$newtime /path/to/quasi/TM_backup/current
And that's all there is to it. Note that you may need a newer version of rsync than what comes with macOS now (2.6.9)—I use version 3.1.2 from Homebrew, so I can't say for sure that this script works with the stock version.
I've only been using this for a couple weeks, but it's working well for me so far.