The Robservatory

Robservations on everything…

 

Fix a “could not complete your purchase” App Store error

I've been having an odd issue with the Mac App Store app on my Mojave-running iMac: Sometimes the App Store app will fail to install an update for some app. When that happens, I see a dialog with this text as the title:

We could not complete your purchase.

Below that is a single word, "cancelled," and that's all. Searching the web, I came across this thread on stackexchange.

What finally worked for me was a combination of things listed there—none of these steps on their own seem to fix the problem, but all together do, at least until it occurs again.

  1. Quit the App Store app.
  2. Switch my DNS to another provider.
  3. In Terminal, paste this command and press Return: open "$TMPDIR/../C/com.apple.appstore/"
  4. Confirm that the Finder opened a window to the com.apple.appstore folder, then drag everything there to the trash.
  5. Back in Terminal, paste this line and press Return: killall -9 appstoreagent
  6. Relaunch the App Store app.

This method has worked for me each time I've had this issue. It's annoying that it keeps recurring, but at least the fix is relatively simple.

How the 2020 iPad Air stacks up to its predecessor

Back in April of 2020, when I replaced my 2016 iPad Pro with a third-generation iPad Air, I wrote about the impressive performance improvements. Fast forward to fall 2020, and I again find myself with a new iPad Air, but this time, it's the fourth generation 2020 edition. Yes, after waiting four years, I now have my second new iPad in seven months.

Why so soon? It was a chain reaction thing, where we wanted to upgrade a relative's very old (think 30-pin connector) iPad with a newer one, and my wife wanted a newer one as well. So my "new" Air went to her, hers went to the relative, and I wound up with the new fourth-generation iPad Air. So I thought I'd take a minute and update a couple of the tables from the prior article…

First up, the specs comparison…

2016 iPad ProiPad Air 3rd GeniPad Air 4th GenAir vs Air
Cost$749$649$749+15%
Screen Size9.7"10.5"10.9"+4%
Resolution2048x15362224x16682360x1640+4%
RAM2GB3GB4GB+33%
Storage128GB256GB256GB--
CPUA9XA12 BionicA14 Bionic

--
Cache64KB + 64KB128KB + 128KB128KB + 64KB--
Cores22 high perf. + 4 high eff.2 high perf. + 4 high eff.--
GraphicsPowerVR 7XT (12 cores)Apple GPU (4 cores)Apple GPU (4 cores)--

The cost went up $100, and for that, it comes with TouchID, a slightly larger screen, and a much faster processor. How much faster? Let's see…

Benchmarks

I re-ran the same two benchmarks I used in the original comparison: Geekbench 5 and 3DMark Sling Shot. Here's how all three iPads compared…

2016 iPad ProiPad Air 3rd GeniPad Air 4th GenAir vs Air
Geekbench 5 CPU Single6561,1141,588+43%
Geekbench 5 CPU Multi1,1982,8924,208+46%
Geekbench 5 Compute (Metal)3,8204,70112,462+165%
3DMark Sling Shot Extreme2,9835,1706,522+26%

There are nice improvements in all the results, but the Geekbench Compute score change is huge—more than double the prior result. I don't know what changed, as both iPads have four-core GPUs. But clearly, something's changed, and for the very much better.

Wrap Up

In day-to-day use, the 2020 Air is quicker than my old one, but it's not like the huge jump I saw moving from the 2016 iPad Pro. I've had it for a few weeks now, and I still don't really like TouchID on the power button instead of on a dedicated button on the front. With the dedicated button, home was one press away, the app switcher was a double-press away.

Now home is a long drag from the bottom of the screen, and the app switcher is a shorter drag with a delay from the bottom of the screen. And then there's the matter of the ugly light (or dark) bar at the bottom of the screen—after dragging from there only a couple times, it becomes automatic and the indiator is merely an annoying visual.

For most anyone except true "power users," I think this new Air is probably more than enough iPad for their needs.

Bookmark both of Apple’s system status pages

I've long known about Apple's general System Status page, which provides a dashboard showing the state of most of Apple's consumer-focused services:

https://www.apple.com/support/systemstatus/

Until yesterday's "why can't I launch any apps?" outage, however, I'd never known that they also have the same type of status page for developer-focused services:

https://developer.apple.com/system-status/

But this page is useful to more than just developers (and it doesn't require a login to view). Had I known about it earlier, yesterday it would've shown that they were having a problem with the Developer ID Notary Service, which is why apps wouldn't launch.

In typical Apple understatement fashion, they've posted the resolved status for that service today:

"Some users were affected" and "Users may have experienced issues with the service" certainly make it sound less painful than what it was, i.e. "A ton of users were unable to use their Macs" and "Mac users could not launch their apps for over two hours." Somehow Apple needs to come up with a better failure mode for the service, as the results yesterday were unacceptable.

Note: If it happens again, simply edit the /etc/hosts file as root, and add this as the last line:

0.0.0.0      ocsp.apple.com

That will prevent your Mac from trying to contact the validation server at all. Note: This seems to break the App Store app, but it let me keep working, which was more important at the time.

A full history of macOS (OS X) release dates and rates

Updated and republished for macOS 11.0.1; skip it unless you really really care about all the macOS releases. Originally published on November 14th, 2005.

Below the break is a table showing all major releases of macOS (previously Mac OS X) from the public beta through the latest public version, which is 11.0.1, as of November 12th, 2020—the 140th release in total.

Note: Click the ⓘ symbol to read Apple's release notes for a given update.

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A deep dive into the Apple Arcade—Part Six

Today wraps up my deep dive into the Apple Arcade. As a refresher, here's what's in each part of the series:

  • Part One: This covers what I look for in games, some general observations on the games in the Arcade, and the lengthy list of games that didn't make my first cut.
  • Part Two: A slightly deeper look at the first half of the games I felt merited additional time for playing and testing.
  • Part Three: A slightly deeper look at the second half of the games I felt merited additional time for playing and testing.
  • Part Four: The first half of my set of definite keeper games.
  • Part Five: The second half of my set of definite keeper games, including my two favorites.
  • Part Six: The part you're reading now; wrapping it all up.

So is the Apple Arcade worth its $5 per month cost?

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A deep dive into the Apple Arcade—Part Five

Today wraps up my deep dive into the Apple Arcade. As a refresher, here's what's in each part of the series:

  • Part One: This covers what I look for in games, some general observations on the games in the Arcade, and the lengthy list of games that didn't make my first cut.
  • Part Two: A slightly deeper look at the first half of the games I felt merited additional time for playing and testing.
  • Part Three: A slightly deeper look at the second half of the games I felt merited additional time for playing and testing.
  • Part Four: The first half of my set of definite keeper games.
  • Part Five: The part you're reading now; the second half of my set of definite keeper games, including my two favorites.
  • Part Six: Wrapping it all up.

And now, the rest of the keepers…

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A deep dive into the Apple Arcade—Part Four

Today wraps up my deep dive into the Apple Arcade. When I planned this, one Part Four post was going to cover everything left…but it was way too long. So I'm still publishing it all today, but I've split the last part into three separate posts. So here's the full series:

  • Part One: This covers what I look for in games, some general observations on the games in the Arcade, and the lengthy list of games that didn't make my first cut.
  • Part Two: A slightly deeper look at the first half of the games I felt merited additional time for playing and testing.
  • Part Three: A slightly deeper look at the second half of the games I felt merited additional time for playing and testing.
  • Part Four: The part you're reading now; the first half of my set of definite keeper games.
  • Part Five: The second half of my set of definite keeper games, including my two favorites.
  • Part Six: Wrapping it all up.

Before I get to the keepers, though, there were two more games released while I was working on these posts, so I'll take a quick look at those.

All of You In this unique puzzler, your character is a chicken that needs to collect a number of lost baby chicks. Your chicken walks from left to right across the circles as seen at right. One circle can be animating at a time while the others are still. On some levels, you can rearrange and/or flip the circles, too. (In the level at right, you animate the dynamite circle first, so it explodes before you walk across.)

Higher levels have more circles, so there's not so much empty space…and some of the puzzles get a bit tricky. It's fun, but I'm not sure it's a keeper just yet.

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A deep dive into the Apple Arcade—Part Three

My new iPad Air came with a surprise (at least, to me): A three-month trial to Apple Arcade. So I decided to look at all 139 games available in the Apple Arcade.

Here's what's in each part of the series:

  • Part One: This post includes what I look for in games, some general observations on the games in the Arcade, and the lengthy list of games that didn't make my first cut.
  • Part Two: A slightly deeper look at the first half of the games I felt merited additional time for playing and testing.
  • Part Three: The part you're reading now; a slightly deeper look at the second half of the games I felt merited additional time for playing and testing.
  • Part Four: The first half of my set of definite keeper games.
  • Part Five: The second half of my set of definite keeper games, including my two favorites.
  • Part Six: Wrapping it all up.

Here's the second set of nine games that I felt worth more time testing. Obviously these summaries still aren't anything close to a full review, but there's a bit more detail (and screenshots; click for the large version).

No Way Home What starts as a top-down space shoot-em-up turns into more of a mission-focused shooter—collect things for upgrades, take this to that. Lovely graphics and fun gameplay, plus a helpful robot assistant helps you battle. And while it's another dual control, the second control is for firing direction not camera view direction, which is much less of a pain for me.
Operator 41 One of the "sneak about in the dark" games, and the graphics have a nice grainy texture to them. The ground is divided into grid squares, and you move by tapping on a destination grid square. It's a simple concept, but it's well executed here, and some of the moves require impeccable timing—roving guards and rotating security lights make for brief bits of protected space.

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A deep dive into the Apple Arcade—Part Two

My new iPad Air came with a surprise (at least, to me): A three-month trial to Apple Arcade. So I decided to look at all 139 141*Two more games were released during the writeup of this series. games available in the Apple Arcade.

Here's what's in each part of the series:

  • Part One: This post includes what I look for in games, some general observations on the games in the Arcade, and the lengthy list of games that didn't make my first cut.
  • Part Two: The part you're reading now—a slightly deeper look at the first half of the games I felt merited additional time for playing and testing.
  • Part Three: A slightly deeper look at the second half of the games I felt merited additional time for playing and testing.
  • Part Four: The first half of my set of definite keeper games.
  • Part Five: The second half of my set of definite keeper games, including my two favorites.
  • Part Six: Wrapping it all up.

Obviously these summaries still aren't anything close to a full review, but there's a bit more detail (and screenshots; click for the large version).

A Fold Apart This puzzler's unique twist is that the characters are walking around in what is, essentially, a landscape made up of pieces of paper. The paper can be folded and/or flipped over, and solving puzzles involves some combination of flipping and folding in order to complete the path the characters are following. It's colorful and relaxing, yet the puzzles require some creative thinking.

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A deep dive into the Apple Arcade—Part One

My new iPad Air came with a surprise (at least, to me): A three-month trial to Apple Arcade.

I thought if I'm going to trial it, I should really trial it. And what better way to do that than by playing everything they offer? So over the last few days, I have downloaded, launched, played a bit of, taken some very brief notes on, and (in most cases) deleted a total of 139 141*Two more games were released during the writeup of this series. games.

Here's what's in each part of the series:

  • Part One: The part you're reading now, it covers what I look for in games, some general observations on the games in the Arcade, and the lengthy list of games that didn't make my first cut.
  • Part Two: A slightly deeper look at the first half of the games I felt merited additional time for playing and testing.
  • Part Three: A slightly deeper look at the second half of the games I felt merited additional time for playing and testing.
  • Part Four: The first half of my set of definite keeper games.
  • Part Five The second half of my set of definite keeper games, including my two favorites.
  • Part Six: Wrapping it all up.

I am not going to begin to pretend I will post a full review of each of these games. For most of them, in fact, I can provide only a passing first impression based on my one-time testing of each game.

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