scaudill wrote:
Hi,
I have been editing my pictures with Lightroom/Photoshop on a laptop with a 15” screen. I will be moving to an iMac and have two options in monitor size a 21.5” and a 27”. I looked at a 27” yesterday and it seems huge. In the members valuable opinion, is the 27” two large, almost overwhelming? What would be the preference among the group? Thanks
I have a Late 2013 21.5" iMac. It has been, and still is, adequate for daily use. I edit 4K video on it (I also use an external monitor for editing. It's connected via an HDMI to Thunderbolt/Displayport adapter.)
I also run Lightroom Classic and Photoshop CC on it. It came with 8GB RAM and a slow 1 TB hard drive, which I've recently replaced with 16GB RAM and a very fast 2TB SSD. I'll probably keep this until Apple no longer supports it with MacOS upgrades.
The 27" iMac can be placed farther away from you on a deep desk. It also has EASILY REPLACEABLE RAM. The 27" model has a simple door on the back to access its ram slots. Upgrading memory takes seconds. The 21.5" iMacs require tricky disassembly to upgrade RAM. Both models require the same disassembly to replace the SSD drive.
DO get a minimum of 16GB of RAM. DO get the largest SSD drive you can afford. 128GB isn't enough.
You don't have to buy the RAM and SSD upgrades from Apple at their ridiculous prices — if you are handy with tools, VERY dexterous, and have experience working with electronics. OWC (Other World Computing — AKA Macsales.com) now has RAM and SSD options for both 21.5" and 27" 2019 iMacs. They also have tool kits for the disassembly/installation/reassembly and detailed videos showing how to do it.
After upgrading my old machine, I'm a big believer in SSDs. More RAM lets me run more apps at the same time and avoids the OS having to swap code onto and off of disk. The SSD speeds up disk input/output. It takes 1/7 the time to render video with the upgrades than it did before. More RAM and SSD capacity are worth their prices, if you don't buy them from Apple.
My one mistake in getting the base machine I did was NOT getting the upgraded, dedicated graphics processor. If you can, get one of the higher models with a fast graphics processor. It provides an extra kick for still and video image processing. It can be used to speed math computations in other applications, too.
Generally speaking, the effectiveness of processor upgrades depends on the work you do. If your applications are MULTI-THREADED, meaning they break down big tasks and send the parts to multiple processor cores at the same time, then having 6, 8, 12, or more processor cores can help. If your apps run in a single core, well... more processor *speed* can help. Apple's Final Cut Pro video editor is a good example of a multi-threaded app. Parts of Lightroom and Photoshop benefit from multi-threading, too. Apps like Microsoft Office 365 don't really seem to need much to keep them happy.