Hewlett-Packard’s Z27s is a 27-inch 4K Display for Your Mac Without the 4K Price

| In-Depth Review

Hewlett-Packard Z27s 27-inch IPS UHD Display

1. Introduction

I spent many years of working with very nice Apple displays, culminating in a 2010 iMac. However, things changed a few years ago when Apple elected to let its 27-inch Thunderbolt display, launched in July 2011, stagnate. That resulted in my search for a suitable display for a 2013 Mac Pro which I acquired in June of 2014. That was just about the time when Hewlett-Packard began to deliver some really modern, exceptional displays. That story about my search for a new display starts with:

My Search: a New Display for a Mac Pro, Part I

The end result was the purchase of a Hewlett-Packard Z27i which I described here:

My Search: a New Display for a Mac Pro, Part II

The Z27i was purchased in December, 2014, and I have been incredibly pleased with its 2nd generation, crisp 2560 x 1440 IPS display.

Since then, Hewlett-Packard has continued to develop its line of "Z Displays" and the "Ultra-high Def Z displays". The Z27s is the display I have been testing lately, and while it is very similar in appearance to the Z27i I own, its major feature is the 3840 x 2160 resolution, technically Ultra High Definition (UHD) display. Read on to see more about my out of box experience, use with a Mac Pro, my reaction to using a 4K display for everyday work and other features.

Finally, as you will see, this review was written from the perspective of a fairly experienced Mac user, but not as a video professional or a color professional.

2. What You Need to Know First

Here's the executive summary for the tl;dr crowd. This display comes well packed in a not-too-large box filled with plenty of styrofoam. A DisplayPort to miniDisplayPort cable was included, which is just what one needs for a Mac. I connected the power cable with ease; there is no power brick. After connecting the DisplayPort cable and booting up, the display detected an input on that port, and my display was up and running along side the 2nd display I use, the Apple 24-inch Cinema display. No software or drivers are required for a Mac. All I needed to do was set the desired resolution in System Preferences > Display. Here's the configuration from About This Mac > Displays.

Out of the box, I checked the display for bad pixels and found none. I started the review process in September with OS X Yosemite and am now running El Capitan. During that transition, there was no impact or significant change in operation. In fact, things got better. When I switched Desktop Spaces in OS X Yosemite, there was no slow glide right to left. Instead, it was almost a snap and a stutter. That effect is gone in El Capitan and switching between spaces is very smooth.

This product was flawless out of the box, and as Apple people like to say, "everything just worked." That's important these days.

3. How it Was Tested

The Mac used for testing is a 2013 Mac Pro with 16 GB RAM and 2 x AMD FirePro D300s with 2 GB VRAM each. I made the HP display the main display with a single menu bar via System Preferences > Mission Control > Displays have separate Spaces = off. Thanks to the vertical adjustment ability of the Z27s, I was able to match its height to be the same as the Apple Cinema display. (That height adjustment is important to me and was a major factor in my original decision to go with the HP Z display family last year.)

Left: Apple 24-inch Cinema. RIght: Z27s (Mac Pro behind on left.)

The HP display was connected to Thunderbolt Bus 1, Port 1 and the Apple Cinema display to Thunderbolt Bus 2, Port 2. See Apple tech note HT202801. As I mentioned above, with DisplayPort 1.2, only one cable is required to drive this display. DisplayPort 1.2 allows 4K at 60 Hz.

Next page: The Out of Box Experience

Product: HP Z27s 27-inch IPS UHD Display

Company: Hewlett-Packard

List Price: US$699.00


Outstanding Product. Get It Now!


Bright, fast, LED backlit 4K IPS display that works with any modern Mac (or PC). Many resolution modes less than 4K. Height, pivot, tilt and rotation (to portrait) adjustments. 10-bit color and reaches 111 percent of the sRGB color gamut. Worked out of the box with a Mac and no drivers required. Several different cables included. Three year warranty.


The onscreen display panel is hard to locate and the buttons aren't well marked. There is no built-in camera or speakers for conferencing. USB 3 ports on the side are awkward.

Popular TMO Stories

No Comments

Log in to comment (TMO, Twitter or Facebook) or Register for a TMO account