macbook

Why is my MacBook warm when the lid is closed (in sleep mode)?

When I woke up last night it was a little windy outside, so I decided to unplug my MacBook Pro because the power tends to flicker here. When I picked up the MacBook I noticed that it was very warm, even though the lid was closed and it was in sleep mode. This morning I decided to dig into the “Why is my MacBook hot even though the lid is closed and it’s in sleep mode” question.

Great tech review of Apple’s iPad A12X system

Kudos to Samuel Axon of Ars Technica for writing a very good tech review of the hardware behind Apple’s new iPad Pro (2018). As I was reading it, it reminded me of the old style of solid writing that I used to get when I bought print copies of magazines.

One of the nuggets of the article is shown in the image I’ve attached here, where you can see that the 2018 iPad Pro is faster than every MacBook Pro in existence other than its 2018 model, at least in terms of the Geekbench multi-core performance tests. If you dig through the images in the article you’ll see that the story isn’t quite as powerful in the single-core benchmark, where the iPad Pro lags the 2018 MacBook Pro by up to 16%. But in those tests the iPad Pro is roughly the equivalent of a 2018 Dell XPS 15 2-in-1 model. (The older Macs use Intel Core i7 and Xeon W processors, and the Dell model uses an Intel Core i7. The 2018 MacBook Pro uses an Intel Core i9.)

These numbers — comparing a tablet to i7 and i9 processors — make one think that Apple will be using their own chips inside Mac computer systems some time soon.

How to make a backup copy (ISO image) of a CD or DVD using the MacOS dd command

Table of Contents1 - Step 1: Insert a CD or DVD2 - Step 2: Find the CD/DVD identifier3 - Step 3: Unmount the drive4 - Step 4: Copy the DVD with the dd command5 - Step 5: Eject your media

If you want to make a backup copy (an ISO image) of a CD or DVD on a MacOS system using the Unix dd command at the Mac Terminal command line, I’ll demonstrate the process in this tutorial.

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Step 1: Insert a CD or DVD

Assuming that you’re using an external CD/DVD drive, the first step is to connect your drive to your computer, and then insert a CD or DVD. If you insert a movie or music CD and an application automatically starts playing, quit that application.

Bloomberg says Apple is developing a new MacBook Pro

A Bloomberg report says that Apple is planning to release a new MacBook Pro that has a narrow OLED screen at the top of the keyboard, which may replace the function keys. In that same article they share this chart, which shows iPad sales compared to Mac sales (which presumably includes all MacBook, MacBook Pro, and Mac Pro models).

Apple profits from PC sales

Apple has more profit from PC sales than the next five Windows PC vendors combined. (Image from asymco.com.)

I appreciate this. Business people should think in profit, not revenue, but most state revenue. At my software firm, our revenue was only $2M annually, but our profit approached 25%. That's the same as a $10M/year firm with a profit margin of 5%, with a lot less risk.