Latest or all posts or last 15, 30, 90 or 180 days.
Upgrade the memory of your 2019 iMac up to 128GB
PLEASE buy at B&H via this site to support Lloyd’s reviews!

TIP: How to Force the use of DNG sidecar files with Adobe Camera Raw

See my Leica SL wish list and Leica M wish list at B&H Photo.

Modification of orginal RAW files is in my view a risky game: files can be potentially be damaged, modified files are very large and have to be backed-up in their entirety, original shooting settings in the DNG are masked or overwritten. Basically, I prefer to think of my RAW files as original negatives/slides; I do not want them modified—ever. This has implications for forensics and law enforcement as well. Originals should be unaltered originals.

Unfortunately, at least in Photoshop, Adobe Camera Raw does not respect its own sidecar preferences: opening a DNG file modifies the file, writing/overwriting internal data as well as changing the file modification date. Each to his own, but I find this very annoying for backup, sorting by date, etc.

Adobe Camera Raw Preferences for DNG sidecar files

Solution: lock DNG files

The lockDNG and unlockDNG scripts are trivial. They lock or unlock all DNG files in the current directory, using the command line in Terminal. I save them as executable scripts in my PATH.

# lockDNG ©2016 DIGLLOYD INC
# LOCK all DNG files in current directory, recursively
find . -name "*.DNG" -exec chflags -v uchg {} \;

# unlockDNG ©2016 DIGLLOYD INC
# UNLOCK all DNG files in current directory, recursively
find . -name "*.DNG" -exec chflags -v nouchg {} \;

Using the lockDNG and unlockDNG commands is simple:

# type 'cd ' then drag desired folder into Terminal window. Example:
diglloydMP:DIGLLOYD lloyd$ cd /Volumes/Archive/2016-0606-TripPhotos 
diglloydMP:2016-0606-TripPhotos lloyd$ lockDNG

# Unlock DNG files diglloydMP:2016-0606-TripPhotos lloyd$ unlockDNG

When a DNG file is locked, this forces ACR to use sidecar files. It has some hassle factor: reorganizing/moving DNG files requires unlocking them. The OS X Finder shows lock icons once locked.

Locked DNG files: forces Adobe Camera Raw to use sidecar files
OWC Thunderblade Thunderbolt 3 SSD
Gen 2!

Blazing fast, 1TB, 2TB, 4TB, 8TB.

Lloyd’s all-time favorite SSD!

√ No more slow and noisy hard drives!
128GB Memory in iMac 5K

Up to 128GB for 2019 iMac 5K!
Up to 64GB for 2015/2017 iMac 5K

Save nearly 50% over Apple pricing

Best Deals, Updated Weekly
B&H Deal ZoneDeals by Brand/Category/Savings
Deals expire in 19 hours unless noted. Certain deals may last longer.

diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | Twitter
Copyright © 2019 diglloyd Inc, all rights reserved.