My touchstone is Ansel Adams. He manipulated images like crazy using the tools available to him.
When Amazon uses its own shipping service, Amazon Logistics, they provide real-time tracking on a map as the delivery vehicle nears your location. I keep the tracking page open on my iPad. A banner appears when map mode is available. I like to meet the drivers downstairs in my apartment building so they don't have to fuss with our sometimes-flaky security system. Always get a big smile.
Prime shipments almost always arrive in one or two days, barring snow or severe traffic congestion. The nearest fulfillment center is in Newark, NJ, about 25 miles away.
Perhaps of interest to long-time Nikon users: the D7200 meters through non-CPU AI lenses in aperture priority mode. The D7500 accepts them but the meter doesn't work - manual mode only.
>I run my 27" iMac (late 2011) off an external SSD via Thunderbolt
I run my mid 2011 Mac mini the same way. You can go into System Preferences > Startup Disk and set the external SSD as your boot drive. Then you won't need to use the Option key.
That view of the cameras shows why some people feel the need to downsize their gear.
The guy asked a question that called for a simple answer, but noooo...
https://simple.wikipedia.org/wiki/Firmware
We're talking cameras here.
Firmware is software contained in a reprogrammable chip in a device. The chip remembers what it contains even without power. A firmware update is a program that writes new software into the chip. Once the update is written, it stays put indefinitely, unless deliberately changed by another update (barring lightning strikes, static discharges, solar flares, or hacker attacks).
All digital cameras are special purpose computers. They run on computer code.
The National Automobile Museum is in Reno. http://www.automuseum.org/
Adams used the tools at his disposal to increase the emotional impact of some of his most famous images. He used the zone system of exposure and development to assure that his negatives captured the detail in both highlight and shadow that he wanted. He then used selective exposure and development of his prints to bring out the image he had already built into his negatives. Highlight, shadow, contrast, dynamic range all came into play. His enlarger had an array of switchable bulbs to shape the exposure of his prints to his vision. I don't doubt that he would have embraced today's digital post-processing techniques enthusiastically. It was commonly observed that a simple snapshot of one of his Yosemite scenes was invariably disappointing. It lacked the unseen manipulation of the master that made his work so distinctive.
Google didn't find the book recommended above. You might go to a library or used book store and look through the old, pre-digital books on photography. Some aspects of photography are timeless.
Fritz Henle (RIP) was known as Mr. Rollei for his mastery of the square format Rolleiflex TLR.
PS - you will need to format the card as HFS+ to avoid the 4GB file size limit of FAT32.
If you don't often use the Mac's SD card slot for other purposes, an easy way to add a modest amount of storage is to put in an SDXC card. I use a 128GB card to hold program and OS installers, and other seldom-used files. A 128GB card costs about $60. Amazon has a 256GB Sony card for $98 and change. The files are always available and Time Machine backs up the card. For this use, a slower, lower-priced card is fine.
Of course, an external hard drive will give you vastly more storage per dollar.
I also use CleanMyMac 3. It's never caused a problem.