Adobe has discovered the compatibility issues listed below with running Lightroom Classic and Lightroom CC (and earlier) with macOS 10.14 Mojave. Adobe strongly recommends that customers update to the current release prior to updating to macOS 10.14 Mojave. Version 10.14.6. IMac (Retina 5K, 27 inch, Late 2015) Processor 4 GHz Intel Core i7. Memory 16 GB 1867 MHz DDR3. Startup Disk Mojave. Graphice AMD Radeon R9 M390 2 GB. Attached image is of space on my computer drives which I think have enough spare space for working memory. Check for compatibility issues in macOS Mojave before you upgrade and find out which apps are incompatible. Apps incompatible with Mojave: Apple, Adobe, Microsoft. Since Lightroom 6 arrived.
Adobe Lightroom Version 6
December 2020 release (version 4.1) and later
Minimum and recommended system requirements for Lightroom

| Minimum | Recommended | |
| Processor | Intel®, AMD, or ARM processor with 64-bit support; 2 GHz or faster processor | |
| Operating system | Windows 10 (64-bit) Version 1903 or later | |
| RAM | 8 GB | 16 GB or more |
| Hard disk space | 2 GB of available hard disk space; additional free space is required during installation and sync | |
| Monitor resolution | 1024 x 768 display | 1920 x 1080 display or greater |
| Graphics card |
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| For more information, see the Lightroom GPU FAQ | ||
| Internet | Internet connection and registration are necessary for required software activation, validation of subscriptions, and access to online services† | |
| Minimum | Recommended | |
| Processor | Multicore Intel® processor with 64-bit support or M1 Apple Silicon processor | |
| Operating system | macOS Mojave (version 10.14) or later | macOS Big Sur (version 11) macOS Catalina (version 10.15) |
| RAM | 8 GB of RAM | 16 GB recommended |
| Hard disk space | 2 GB of available hard disk space; additional free space is required during installation and sync Lightroom will not install on case-sensitive file systems or removable flash storage devices | |
| Monitor resolution | 1024 x 768 display | 1920 x 1080 display or greater |
| Graphics card |
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To find out if your computer supports Metal, see Mac computers that support Metal For more information, see the Lightroom GPU FAQ | ||
| Internet | Internet connection and registration are necessary for required software activation, validation of subscriptions, and access to online services† | |
† NOTE: Internet connection, Adobe ID, and acceptance of license agreement required to activate and use this product; the application attempts to validate your software every 30 days for month-to-month members and 99 days for annual members. This product may integrate with or allow access to certain Adobe or third-party hosted online services. Adobe services are available only to users 13 and older and require agreement to additional terms of use and the Adobe Privacy Policy. Applications and services may not be available in all countries or languages and may be subject to change or discontinuation without notice. Additional fees or membership charges may apply.
Adobe Photoshop Lightroom is available in the following languages:
Deutsch
Dutch
Adobe Lightroom 6 Macos Mojave Installer
English
Español
Français
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Português (Brasil)
Polish
Note:
To know the supported languages for Lightroom for mobile (iOS and Android), see Supported languages | Lightroom for mobile.