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How to mirror Mac to Roku TV?
How to mirror Mac to Roku TV?
  • Oka Assist
  • 2026-02-13 11:04:01

How to mirror Mac to Roku TV?

If you have a TCL Roku TV, Roku Box, or Roku Ultra Box, you might want to know if there is any free app that can mirror the Mac to your Roku. Please read this blog to find the answer for people who also ask the questions below. How do I connect my Mac to Roku? Can I AirPlay to Roku? How do I mirror my Mac to my TV? How do I screen mirror to m Roku?

Airplay on some Roku TV

In some models of Roku TV, it supports Airplay, a streaming protocol developed by Apple. With Airplay, you can cast the screen of your Mac or iPhone directly. Check with your Roku devices. If it is in the following appliances, it works. Find your Roku model in your TV's settings -> System -> About. The model list which supports Airplay:

The following devices must be running Roku OS 9.4 or higher:

Roku TV models Axxx, Cxxx, CxxGB, or 7xxxx; Roku Streambar model 9102 Roku Streambar Pro model 9101R2 Roku Smart Soundbar models 9100 and 9101 Roku Streaming Stick+ models 3810 and 3811 Roku Express 4K model 3940 Roku Express 4K+ model 3941 Roku Premiere models 3920 and 4620 Roku Premiere+ models 3921 and 4630 Roku Ultra models 4600, 4640, 4660, 4661, 4670, and 4800 Roku Ultra LT model 4662

The following devices must be running Roku OS 10.0 or higher:

Roku TV model Dxxxx and 8xxxx (where x equals any model number) Roku Streaming Stick models 3600, 3800, and 3801 Roku Express models 3900, 3930, and 3801 Roku Express+ models 3910 and 3931 Roku HD model 3932 Roku 2 models 4205 and 4210 Roku 3 models 4200, 4201, and 4230

3rd Party Apps on Mac

Oka Mirror for Roku TV is the free trial mirror app for Roku TV. You can mirror your screen on TV, including your Mac's audio. If you want to watch a movie or video on your Roku TV, you can only select the option to mirror the video file. Although it is a free trial version, you can try it before you buy the app.

Omi Mirror for Roku is a free app for Roku TV. You can cast a Mac screen to Roku devices with your system audio. There is a latency of 2-3 seconds. But it is already the best mirror app you can find in Mac App Store.

Airbeam is also a good choice for you to mirror your screen to any device. But it is a paid app. there is no free trial in Mac App Store. So it is not recommended in the first place.

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Mac System Data Exceeding 200GB? Here’s How to Actually Clear It — A Deep Dive with Heavy Keynote Usage and Time Machine as Examples I. Problem Overview After long-term use, some macOS users discover that “System Data” in Storage Settings grows abnormally large. Common symptoms include: System Data occupying 200GB or more https://cdn.okaapps.com/resource/图2.webp No corresponding files can be located in Finder Deleting caches or log files has little effect Third-party cleaning tools are ineffective Uninstalling and reinstalling apps (such as Keynote) does not help Even after reinstalling macOS, the issue reappears after some time This problem is especially common among heavy productivity users, such as those working extensively with Keynote, Final Cut Pro, or design tools. II. Commonly Tried but Ineffective Solutions Users typically attempt the following methods, most of which fail to solve the problem at its root: Manually deleting directories such as ~/Library/Caches and ~/Library/Logs Using third-party cleaning tools like CleanMyMac or similar utilities Uninstalling and reinstalling Keynote Reinstalling macOS via “Reinstall macOS” These approaches are limited because they do not address the real sources behind System Data inflation. III. What Exactly Is “System Data”? It is important to understand that: System Data is not a real folder, but rather a collection of data that macOS cannot accurately categorize. System Data may include, but is not limited to: macOS system temporary files Application and system caches Portions of the user Library (~/Library) Files Spotlight cannot classify Large resource files inside application packages Local caches from cloud services (such as iCloud or OneDrive) iPhone / iPad backup files Residual data from deleted user accounts Time Machine local snapshots As a result, System Data cannot be reliably inspected or reduced through simple cache deletion or Finder-based browsing. IV. Key Cause #1: Time Machine Local Snapshots Consuming Disk Space How Local Snapshots Work Even when no external drive or NAS is connected, macOS will: https://cdn.okaapps.com/resource/图3.webp Create a Time Machine local snapshot every hour Retain snapshots from the last 24 hours by default If the backup destination remains disconnected, keep local snapshots associated with the most recent full backup These snapshots: Are based on the APFS file system Do not appear as regular files Are entirely counted under System Data In some cases, local snapshots can consume tens or even hundreds of gigabytes. https://cdn.okaapps.com/resource/图4.webp Why They Sometimes Cannot Be Deleted When Time Machine uses a NAS or network storage device as its backup destination, the following situations may occur: The NAS was previously disconnected The network path or IP address changed The backup was not re-“claimed” by the system As a result, macOS may treat these snapshots as belonging to an unreachable backup destination, leading to: tmutil deletion failures Errors such as Stale NFS file handle Snapshots that cannot be reclaimed, causing persistent disk usage V. Key Cause #2: How Keynote and Similar Apps Amplify System Data Keynote itself is not malfunctioning, but its design inherently amplifies System Data usage: Keynote files are actually packages containing large numbers of resources These may include: High-resolution images Embedded videos Fonts Animation and transition assets Spotlight sometimes fails to correctly classify these resources, causing them to be grouped under System Data. For users who frequently create large, media-heavy presentations, steady growth in System Data over time is expected. VI. Effective Solutions (Prioritized) Solution 1: Verify and Restore Time Machine Backup Status (Recommended) Open Disk Utility From the menu bar, select Show APFS Snapshots Select the system Data volume Check whether a large number of Time Machine local snapshots exist If using a NAS as the backup destination: Reconnect the NAS Select the original backup in Time Machine settings Follow the prompts to claim the existing backup Once the backup relationship is properly restored, macOS can automatically manage and reclaim snapshot space. Solution 2: Use Disk Analysis Tools to Identify Real Space Usage It is recommended to use tools that analyze disk usage without automatically deleting files, such as: GrandPerspective EtreCheck The goal is to identify: Which files or directories consume the most space Whether disk usage is abnormally concentrated in specific areas Avoid relying on “one-click cleanup” tools. Solution 3: Check for Residual Data from Old User Accounts If the device previously: Had multiple user accounts Removed accounts without deleting their home folders Then old home directories may still exist and be counted as System Data. Solution 4: Rebuild the System Environment Completely (Last Resort) When System Data usage becomes severely unmanageable and no clear source can be identified, the only definitive solution is: Fully back up all current data Erase the disk and reinstall macOS During setup: Migrate only the user account Do not migrate system settings, applications, or Library data This approach completely removes legacy data structure issues. VII. Long-Term Prevention Tips (for Keynote and Content Creators) Archive older Keynote projects to an external drive or NAS Avoid storing large volumes of presentation files locally for long periods Keep the Time Machine backup destination consistently available Avoid third-party tools that perform automated “system-level cleaning” Periodically monitor disk usage with analysis tools VIII. Conclusion Abnormally large macOS System Data usage is rarely caused by a single cache or log issue. Instead, it is typically the result of Time Machine local snapshots, application package resources, and inherited historical data structures working together. Only by understanding what System Data actually contains—and addressing the root causes—can disk space issues be resolved effectively and long-term.
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