If your Mac already plays footage smoothly, proxies are optional. They become useful when you need smaller working files, move an edit between computers, or encounter a heavier timeline. In DaVinci Resolve, test the actual editing task before generating proxies for everything.
This guide is for a Mac editor deciding whether to create proxy media for an everyday desktop project in DaVinci Resolve. The menu paths follow Blackmagic Design’s September 2026 DaVinci Resolve 21.1 Reference Manual, including its integrated Fusion and Fairlight sections. DaVinci Resolve 21.1 Reference Manual
What do proxies add when playback is already smooth?
Proxy media consists of alternate versions of source clips linked to the originals through metadata. Resolve lets you switch between the two. Depending on the format and resolution you choose, proxies can reduce the bandwidth and processing required during editing, while the originals remain available for finishing. The manual also identifies portability as a defining advantage: proxy files are independent media that can move between workstations. Resolve manual, Chapter 8: Improving Performance, Proxies, and the Render Cache
That makes smooth playback one part of the decision. If you edit on one Mac, keep the original drive connected, and can comfortably scrub, trim and review the working timeline, there may be little practical benefit. Generating another representation adds preparation time and storage without necessarily improving the task you are doing.
Proxies become more useful in three situations:
- You want a smaller working media set. Appropriately chosen proxies can make an edit easier to carry on another drive or transfer to another workstation.
- The workload grows beyond your initial playback test. A single source clip playing smoothly does not establish how comfortably you can edit several simultaneous camera angles or layers. Test that workload separately.
- You need to continue editing without the originals attached. Resolve can play linked proxies when camera originals are unavailable, subject to its proxy handling setting. Reconnect the originals for finishing and check any operations that require them. Resolve manual, Chapter 8
Smaller files are a goal to verify, rather than a property of every proxy preset. Resolve permits original-resolution proxies and high-quality formats as well as reduced-resolution, more compressed choices. A proxy selected for image quality can have a very different storage footprint from one selected for compact transfer. Resolve manual, Creating and Using Proxy Media
Which tool fits the problem you actually have?
Resolve provides several performance tools with similar names. Choosing one by the symptom helps avoid a lengthy transcode that leaves the real bottleneck untouched. The following decision aid applies the manual’s distinctions to ordinary editing situations. Resolve manual, Proxy Media vs. Other Playback Optimizations
| What you observe or need | Useful first choice | Reason |
|---|---|---|
| Originals and the working timeline are comfortable to edit | Continue with originals | There is no demonstrated playback problem to solve |
| A compact media set for another computer or drive | Proxy Media | Creates portable, independently managed files |
| Source footage becomes difficult to edit under the intended workload | A representative proxy trial | Tests whether replacing the source representation helps |
| Playback slows after adding substantial visual effects | Render Cache | Stores processed results for effects-heavy clips |
| You can accept a lower working resolution while editing | Timeline Proxy Resolution | Reduces timeline resolution on the fly without generating proxy files |
| Audio clip plugins cause processing difficulty in Fairlight | Cache Audio Effects | Caches the affected audio clips’ plugin processing |
Timeline Proxy Resolution does not create proxy files
In Resolve 21.1, choose Playback > Timeline Proxy Resolution > Half Resolution or Quarter Resolution to reduce the working resolution. Choose None to restore it. This is a quick experiment when processing at the current timeline resolution is expensive. It does not create a portable media set or replace the source files with newly encoded versions. Resolve manual, Timeline Proxy Mode Improves Effects Performance
For a synthetic example, imagine a timeline containing neutral geometric graphics over a video clip. If the plain clip plays comfortably but the completed composition slows down, test a reduced timeline resolution or caching before generating proxies for the entire media pool. This is a diagnostic recommendation derived from the tools’ documented purposes, not a measured performance result.
Fusion and Fairlight have their own controls
For a Fusion composition that is slow to interact with, the Fusion page offers separate Proxy and Auto Proxy quality options. Right-click the transport control area, away from the forward and reverse play buttons, to access them. Auto Proxy reduces image resolution while you drag a parameter and restores it when you release the control. These are composition preview controls; generating linked video proxies is a separate operation. Resolve manual, Chapter 63: Exploring the Fusion Interface
For effects-heavy clips playing in the timeline, Playback > Render Cache > Smart is another supported path. The manual describes Fusion Output Caching as a pre-color cache that can include Fusion effects. Its purpose is to avoid repeatedly calculating expensive work during playback. Resolve manual, Chapter 8: How Cached Media Is Organized
In Fairlight, if the problem comes from an audio clip’s plugins, right-click that clip and choose Cache Audio Effects. Resolve caches the processing without permanently changing the source audio; changing plugin settings can trigger recaching. This documented command applies to clip effects, so it should not be treated as a blanket solution for every track or bus processing issue. Resolve manual, Chapter 180: Audio Effects
How to test whether proxies are worth making
Use a small, representative trial before committing the whole project. Choose clips that reflect the real edit: its resolution, format, duration and simultaneous layers. Include footage that is awkward to scrub or trim, if any. Keep the timeline, effects and cache settings consistent when comparing originals with proxies.
- Establish the baseline. Review a short section using originals. Try normal playback, moving between distant positions, trimming and any multicam viewing you actually use.
- Generate proxies for those clips only. Use the settings and commands below.
- Switch to Prefer Proxies. Repeat the same actions on the same section.
- Inspect the files. Compare their total size with the originals and decide whether the generation time and storage cost suit your workflow.
- Choose by the outcome. Expand proxy generation if editing becomes meaningfully easier or the media set becomes usefully portable. Otherwise, continue with originals.
For an explicitly illustrative storage calculation, suppose your selected originals occupy 120 GB and the generated proxies occupy 18 GB. Carrying only the proxies would reduce that working media set by 102 GB, or 85%. Keeping both sets on the same drive would instead require 138 GB before cache and other project assets. Those figures are invented inputs to show the decision, not expected compression ratios.
This distinction matters on a desktop Mac: creating smaller alternate files does not free space while you retain both representations locally. The benefit appears when the smaller set serves a specific purpose, such as moving the edit to another workstation.
How to create and verify proxy media in Resolve 21.1
Open Project Settings > Master Settings. In Optimized Media and Render Cache, set Proxy Media Resolution and Proxy Media Format. Under Working Folders, check Proxy generation location and choose a destination with enough space. Resolve’s Media Storage preferences can override that generation location, so verify where the files actually appear. Resolve manual, Creating and Using Proxy Media
For an initial Mac trial, Half resolution and ProRes Proxy are reasonable editorial choices when available in your installed configuration. They are a starting point to evaluate, not a universal optimum. Resolve documents several ProRes and DNxHR choices plus H.264 and H.265 options; the right tradeoff depends on the required image quality, bandwidth and file size. Resolve manual, Proxy Media Resolution and Format
Select the test clips in the Media Pool, right-click a selected clip and choose Generate Proxy Media. After generation finishes, choose Playback > Proxy Handling > Prefer Proxies. In Media Pool List view, right-click a column heading and enable Proxy and Proxy Media Path to inspect availability and location. Resolve manual, Creating and Managing Proxy Media
If you move the proxy files, select their source clips in the Media Pool, right-click and choose Link Proxy Media, then locate the files or directory. Proxies created outside Resolve must meet its linking requirements, including matching source timecode, frame rate and filename excluding the extension, and using a supported format and codec. Generating the trial inside Resolve avoids having to establish those external conversion details yourself. Resolve manual, Generating Proxy Media in Other Applications and Linking Clips
How to return to originals and finish the edit
The proxy handling choices have an important fallback difference:
- Prefer Proxies uses originals when a clip has no available proxy.
- Prefer Camera Originals uses proxies when originals are unavailable.
- Disable All Proxies forces original-media playback and shows Media Offline when an original is unavailable. Resolve manual, Switching Between Proxy Media and Original Media
For a straightforward check before detailed image evaluation, reconnect the originals and select Disable All Proxies. Confirm that the timeline remains online. This is more conclusive than selecting Prefer Camera Originals, which permits fallback. Return reduced preview settings to full resolution when judging fine detail.
Resolve’s Deliver page uses original source media by default. The Use proxy media checkbox under the video render settings’ Advanced Settings overrides that behavior. Leave it unchecked for an original-based final render and verify the originals are accessible. A deliberate proxy-based draft is supported, but it should be an intentional export choice. Resolve manual, Using Proxy Files for Delivery
If you also use Final Cut Pro, follow Apple’s export instructions for that application: switch playback back to optimized/original media before sharing. Apple explicitly documents this step; Resolve’s default Deliver behavior should not be assumed to apply to Final Cut Pro. Create optimized and proxy files in Final Cut Pro for Mac
When your Mac already handles the edit comfortably, leave proxy generation optional. Create proxies when they solve a demonstrated source-media problem or provide a smaller, portable working set. If the difficulty appears only after visual or audio effects, start with the corresponding preview or cache controls, then verify the finished edit against the originals.
Sources
- DaVinci Resolve 21.1 Reference Manual — Blackmagic Design.
- Create optimized and proxy files in Final Cut Pro for Mac — Apple.