All Posts by Date or last 15, 30, 90 or 180 days.
also by Lloyd: diglloyd.com photography and WindInMyFace.com
Thank you for purchasing through links and ads on this site.
OWC / MacSales.com...
diglloyd B&H Deal Finder...
Buy other stuff at Amazon.com...
Upgrade the memory of your 2019 iMac up to 128GB
877-865-7002
Today’s Deal Zone Items... Handpicked deals...
$799 $499
SAVE $300

$449 $379
SAVE $70

$1000 $850
SAVE $150

$799 $299
SAVE $500

$249 $234
SAVE $15

$290 $250
SAVE $40

$1149 $799
SAVE $350

$1199 $999
SAVE $200

$1299 $1099
SAVE $200

$2799 $2449
SAVE $350

$3899 $3899
SAVE $click

$18599 $17099
SAVE $1500

$369 $239
SAVE $130

$1499 $999
SAVE $500

$764 $399
SAVE $365

$600 $450
SAVE $150

$1499 $629
SAVE $870

$1499 $629
SAVE $870

$7995 $7495
SAVE $500

$420 $170
SAVE $250

$700 $700
SAVE $click

$2999 $2399
SAVE $600

$1699 $1399
SAVE $300

$169 $99
SAVE $70

$1498 $998
SAVE $500

$200 $150
SAVE $50

$370 $300
SAVE $70

$999 $949
SAVE $50

$1099 $999
SAVE $100

$580 $340
SAVE $240

Save Big $$$$ on Memory for 2019 Mac Pro

Up to 65% better pricing than Apple

Lloyd recommends 32GB RDIMM modules for most users (more expensive LRDIMMS are for 512GB or more).


Install the Driver for the OWC Mercury Accelsior PCIe SSD (OS X Cuts Power Prematurely to PCIe)

See also Caution When Upgrading to OS X Mavericks: Kernel Extensions (ATTO, Drobo).

The OWC Mercury Accelsior PCIe SSD requires that a driver be installed to address an OS X power cut behavior* (see details further below). This blog post is a reminder of sorts.

OWC includes the driver for the Accelsior card as shipped and calls it out visually in the packaging, but one could forget to install it either at initial install or when installing a fresh system. For example, if you’re testing out Mavericks as a fresh system install, install the driver for the Accelsior PCIe SSD. Ditto for any fresh system install.

If the Accelsior PCIe SSD is used in the OWC Mercury Helios case, then a driver is not needed. As per OWC:

Note: Driver ensures proper power-down of Accelsior during sleep, restart, and shutdown actions that may otherwise not occur in the Mac Pro with PCIe connected drive volumes. This driver does not affect or interact with other drivers, software applications, hardware devices, etc.

This driver is not required for use of Accelsior in Thunderbolt to PCIe Expansion chassis (such as OWC Helios). No driver is required for use of Accelsior for Windows or Linux operating systems.

How to check if the Accelsior driver is installed:
About This Mac => More Info => System Report

* The OWC driver for the Accelsior PCIe SSD addresses a behavior (bug) introduced in OS X in which power is cut off prematurely to PCIe cards. This premature power cut-off bug was introduced in an OS X release a good time after I first tested and reported on the Accelsior.

The driver for the Accelsior PCIe SSD inserts a sub-second delay, giving the PCIe card time to finish its business (pending writes). Under Microsoft Windows on the same machine, no driver is needed (because the OS does not have this bug).

The power cut issue would apply to any PCIe card that needs time to do housekeeping before the power is cut, e.g. a hardware RAID card or other PCIe SSD.

Upgrading to the E2

Separately and not related to the above, MPG recommends upgrading to the Accelsior E2 version to gain a new chipset and dual eSATA ports. This is a module swap onto a replacement (bare) card.

OWC Mercury Accelsior E2 PCIe SSD (with flash modules), and prior Accelsior (without flash modules)
OWC Accelsior 4M2 PCIe SSD
6000 MB/sec!
Mac or PC.


Ideal for Lightroom, Photoshop, video.
Capacity up to 16TB!
OWC Envoy Pro EX SSD
Blazingly fast Thunderbolt 3 SSD!

Up to 4TB capacity, USB-C compatible.

USB-C model also available


Great for travel or for desktop!
OWC Thunderblade Thunderbolt 3 SSD

Blazing fast, up to 16TB.

YEE HAH!



√ No more slow and noisy hard drives!

Save the tax, we pay you back, instantly!
View all handpicked deals...

QNAP TS-253Be 2-Bay NAS Enclosure
$449 $379
SAVE $70

diglloyd.com | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2020 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__