Earnest Botello Loc: Hockley, Texas

Even though I am not a Mac person, I went from 27" to 32" and I love it.

Ruthlessrider

My only advice is less about the screen size (27 is great) and more about memory. Load that baby up.

miklj

I recently moved from a MacBook Air to the 21.5" iMac mostly because there isn't enough room on my workspace for the 27"--the 21.5" is perfectly fine for my LR work.

mikegreenwald Loc: Illinois

I absolutely agree.

neillaubenthal

In the displays in system prefs you can choose a folder of images and they will auto change...I think every 5 minutes is the minimum.

NewBEE161 Loc: Olney, Maryland

When I switched from a 15 inch PC laptop to Mac in 2009, I selected the iMac 27 inch model. Upgraded the ram to a maximum 16GB and the hard drive to 1 TB. Twelve months ago, I purchased another 27 inch iMac with 32 GB ram and 2TB hard drive. Both or these are on my desk top with specific functions and software, especially with the upcoming new operating system. I would recommend the 27 inch model -- you will not regret it.

NatureRocks

Perhaps not what you have been thinking, but I have a Samsung TV for my monitor. Cheaper than the typical computer monitor (especially from Apple) but with good colors and size (28"). And the larger size means that I can use my wireless keyboard from across the room, if I so choose and can read the words easily. And for working on photos, the size DOES help, as well as all the color adjustments.

Just an alternate idea....

bpulv Loc: Buena Park, CA

For editing, I absolutely recommend the 27" screen because the larger screen allows you more magnification for fine detail work. I use two 27" iMacs side-by-side and connected to each other. The main screen is my newer iMac and it functions as a full computer with external hard drives for storage and a 5-bay Drobo (RAID) for redundant backup. The older iMac is used as a dumb monitor and the combination is operated using the iMac's Target Display Mode. This mode allows both monitors to function as if they are an extended screen from the main computer working together. That allows me to have Lightroom on one and Photoshop other and, since both are controlled seamlessly by a single keyboard, trackpad and Wacom Tablet, I can mouse between the two and using the Edit In function of Lightroom to move photos between the two programs for efficient workflow. All that is required to use the Target Display Mode is a single cable connecting the two computers; very cheap.

Rathyatra Loc: Southport, United Kingdom

tnste Loc: New Westminster, BC

Definitely go for the 27" IMAC. I have a mid 2011 27" IMAC and am so glad I got the 27" instead of the 21.5". At first it is overwhelming in size but you will get used to it. You wont regret getting the 27". My computer is getting old in the tooth now but I am hanging on as long as possible because I am still using Aperture 3. Aperture is not available if I upgrade so I am still using my 8+ year old IMAC. The new IMAC are impressive. You should know that the 21.5 tops out at a 6 core i7 processor while you can get an 8 core i9 processor as an option on the 27". Also, the 21.5 has a 4K display while the 27" comes with a 5K display. Also, you can upgrade the RAM after you buy the 27" and avoid Apples high cost for RAM but cannot upgrade RAM after the fact with the 21.5". The 27" can be equipped with a more powerful graphics card than the 21.5". Also, the 27" foregoes the 5400 RPM hard drive and starts with a 1 TB Fusion drive.
Even the reviews online recommend the 27" over the 21.5" especially if you are into photography like I am. When I finally do get a new computer I definitely will get a 27" IMAC

odujim Loc: New Jersey

The 27" definitely - you won't regret it!

elliott937 Loc: St. Louis

You have seen many endorsements for the 27". Once you go there, you will never want to go back to something smaller.

AND, when not in your Digital Darkroom, the screen is large enough to have your Internet Browser open on one half of the screen, and your e-mail client open on the other half. Another reason to not go back to something smaller.

burkphoto Loc: High Point, NC

They DO have some easy options to control display size.

Just use the keystroke combination COMMAND + to enlarge, and COMMAND - to reduce the image size in Safari. It works in Apple Mail, too. Other apps may have a 'View' menu with 'Shift Command .' or 'Shift Command ,' keystrokes. Apple Preview uses Command 0 for Actual Size, Command 9 to Fit, Command - to reduce, and Command + to enlarge.

Always look for a View menu to see your options, or just try Command - or Command +

For an alternative method, open System Preferences, choose Displays, then choose Display, then set Resolution to the Scaled option. You should see a menu of resolution options available. My 21.5" has three. Lowering the resolution enlarges the image.

Wuligal Loc: Slippery Rock, Pa.

I have the 27" and love it. It's a joy to be able to have two different projects open on the desktop at the same time.

BobHartung Loc: Bettendorf, IA

I use my MacPro to drive a 32" monitor. The more screen the more tools etc that you can have open at one time especially if you do any Photoshop work.