Optimise Mac Cleanup: Use OmniDiskSweeper and AppCleaner to Remove Apps and Hidden Caches
As people using macOS, on our Apple Computers with expensive SSD's we all face the continual frustration of managing limited local storage space, particularly when utilising devices equipped with smaller SSDs. Over time, unused applications and their corresponding cache files can consume considerable storage capacity. This guide focuses on safely removing irrelevant macOS applications along with their hidden caches using two powerful free tools: OmniDiskSweeper and AppCleaner. It provides a detailed overview of the process to effectively free up valuable space on your Mac. Implement these methods to achieve a better optimised system and lessen future storage challenges.
TL:DR – Tools such as OmniDiskSweeper and AppCleaner can simplify the process of identifying and removing unwanted applications and their caches, ultimately freeing up significant amounts of disk space on your Mac.
Contents
- Understanding macOS storage management
- Downloading and installing the right tools for the job
- OmniDiskSweeper
- Quickly find large, unwanted files and sweep them into the trash
- AppCleaner
- A small application which allows you to thoroughly uninstall unwanted apps
- Using OmniDiskSweeper to identify large files
- Managing apps and their data effectively with AppCleaner
- Best practices for maintaining macOS storage
- Addressing the 'other' storage category
- Conclusion: Enhancing macOS performance through effective management
Understanding macOS storage management
macOS has a unique approach to storage allocation, which can make it difficult for people to grasp how files and applications occupy space. Additionally, many applications generate temporary files, often referred to as cache files, to enhance performance or store local data. However, these files can accumulate to substantial sizes over time, particularly for applications that require large amounts of data, for example, software developer programs or games. Understanding macOS’s categorisation of storage is crucial for effective management; this encompasses not only your media files but also system files, applications, and even the occasional 'Other' storage that can remain a mystery. Even my decent sized 1 TB SSD is 75% full.

As you manage your device’s disk space, using tools that illuminate what occupies your storage can bring clarity. Identifying files by application can offer significant insights when attempting to free up space. Managing storage is not merely an issue of deleting unnecessary files but involves a comprehensive understanding of what resides in the 'Other' category, which can include a variety of items such as caches, application remnants, and system files. This broad spectrum can leave people perplexed and uncertain about which files they can safely remove.
Through ongoing updates and improvements, macOS now provides people with built-in tools that facilitate the monitoring and management of disk space. However, many people still turn to third-party applications for more precise analysis. It is here that OmniDiskSweeper stands out, providing a trusted visual representation of what occupies space on your device and offering help to explore and delete them, whilst AppCleaner ensures that upon removal, applications take their residual files with them.
Downloading and installing the right tools for the job

OmniDiskSweeper
Quickly find large, unwanted files and sweep them into the trash
OmniDiskSweeper recursively searches the filesystem and displays entries sorted and color-coded by size, from largest to smallest - brute forcing its way through the filesystem to determine file sizes. OmniDiskSweeper 1.15 is supported on macOS 11 through macOS 15.
Omni Labs Website
AppCleaner
A small application which allows you to thoroughly uninstall unwanted apps
AppCleaner by FreeMacSoft finds all the small files related to an app and safely deletes them. Simply drop an app onto the AppCleaner window. It will find the related files and you can delete them by clicking the delete button. Version 3.6.8 is the current release, for macOS Mojave up to Sequoia.
AppCleaner WebsiteThe first step towards reclaiming your hard drive space is to obtain OmniDiskSweeper. Available from the Omni Labs page on the Omni Group official website, the installation process is straightforward. People should download the most recent version, for their version of macOS. Once downloaded, drag the application into your Applications folder to store it conveniently on your Mac.
Second step is to get AppCleaner from the FreeMacSoft website. Download AppCleaner from the official website and install it as you would any other application.
Both these apps have been around for years and can be trusted.
Using OmniDiskSweeper to identify large files
OmniDiskSweeper presents a detailed visual of your drives. Select the drive you wish to scrutinise, typically the main Macintosh HD, and the application will begin analysing the contents. This may take a while, so let it finish. Upon completion, a list categorises files according to their sizes, making it straightforward to notice oversized files that may be consuming too much space.
As you browse through the categories, take note of files or folders that stand out based on their sizes. OmniDiskSweeper enables people to drill down into specific folders, revealing subfolders and files which may be hidden within applications.
For example you can see in the screenshot I have drilled right down into my Users > Username > Library > Caches > Google > Chrome folder to see that there are 9.5 GB of profiles in there. Now I could either use Chrome to figure out what they are, or AppCleaner to delete Chrome or just delete them if I know its OK. But I need to takw care as they don't have recognisable names and I wouldn't want to delete all my settings for my main Chrome profile.... Newverheless, OmniDiskSweeper foudn them far more easily than I would have done because its looking down the hierarchy by size which is incredibly helpful.

It is important to comprehend that while deleting files, one should always exercise caution. Files needed for applications to perform optimally should be retained to prevent unwanted errors. Thus, it is essential to evaluate each file or folder before deletion. Once you have identified unnecessary files, use the designated delete capability within OmniDiskSweeper to remove them from your drive.
Managing apps and their data effectively with AppCleaner
AppCleaner serves as a complementary tool designed to ensure that when applications are removed, any residual files such as caches and settings are deleted as well. This is crucial as leftover files can undermine the work done with OmniDiskSweeper by allowing unnecessary data to linger on your system.
Upon launching AppCleaner, you can drag any application you wish to delete directly into its window. The tool will automatically conduct a search for all related files, including caches and logs, verifying that nothing is left behind post-deletion. Take the time to review the files AppCleaner identifies to ensure critical elements are not mistakenly removed. This step improves the cleaning process alongside the disk sweeping conducted by OmniDiskSweeper because often the related files are in folders that are hidden with technical names and numbers rather than being easily identifiable.


After confirming your selections, clicking the Remove button will send the application and the associated data to the bin.
The combination of these tools provides a practical method for people looking to maintain their system performance effectively. Cleaning out applications regularly mitigates the overwhelming accumulation of stale data, especially for people frequently installing and testing new software. Sweeping up with OmniDiskSweeper helpd you find gigantic disk images, zip files and other space hogging files that can be easily selected for immediate deletion.
Best practices for maintaining macOS storage
To keep your Mac functioning smoothly, it is essential to adopt best practices around storage management. Regular maintenance is fundamental; performing periodic scans for unused applications and files ensures that storage does not unexpectedly decrease, particularly when memory is at a premium. Utilising OmniDiskSweeper and AppCleaner in tandem allows people to establish a disciplined approach to handling applications and their data.
In addition to removing unnecessary applications, consider managing downloads and documents effectively. Setting a recurring reminder to review your Downloads folder can prevent its unchecked growth. Identifying old files that can be archived or deleted is an excellent practice that contributes positively to storage maintenance. Remember that the Files app also enables easy organisation and management of several documents, which can further aid in preserving space.
Furthermore, consider cloud storage solutions for items that do not need to reside locally on your device. Platforms such as iCloud or Google Drive, provide optimised storage solutions reducing pressure on local disk utilisation. Storing large files such as videos and photos in the cloud can help alleviate the constant pressure of limited SSD capacity, allowing more space for applications and essential files requiring quick access.
Addressing the 'other' storage category
The 'other' category can encompass varied file types, including caches, temporary files, application leftovers, and even system files that do not conform to typical categorisations like Media or Documents. Many people discover that a significant portion of their storage is occupied by this unspecific category without a clear understanding of what comprises it.
Identifying and systematically targeting files under 'Other' can yield substantial space savings. Regular use of the OmniDiskSweeper will assist in finding hidden caches and old backups taking up unnecessary space. Consider moving such files to external drives if you might need them. Learning how to dig into files by type, as with OmniDiskSweeper, can help to demystify what accumulates within this undefined space.
Using Finder's built-in search capabilities allows people to query their files more precisely, potentially exposing often-ignored temporary files. This dual approach effectively reinforces both people' understanding of their data and their ability to manage the excess that often creeps up on them. Consistent checking for redundant data in tandem with the use of cleaning applications fosters a clear and concise management strategy.
Conclusion: Enhancing macOS performance through effective management
Effective management of disk space on macOS helps to improve performance and longevity of your device, particularly for people with limited storage options. Through the use of OmniDiskSweeper, you can efficiently identify and remove large files, while AppCleaner ensures that when applications are deleted, their residual data is completely removed. The understanding of categories within macOS storage, especially concerning the perplexing 'Other' section, is critical to maintaining optimal efficiency.
Embracing regular clear-outs and leveraging third-party tools for comprehensive clean-ups encourages a more clutter-free local environment that fosters both creativity and productivity. With continual advancements within macOS, people are encouraged to establish routines that promote cleanliness of their disk space, ultimately ensuring the device remains productive and efficient.
By staying informed and taking actionable steps towards regular maintenance, you can stave off storage challenges effectively while prolonging the performance of your Mac.
Finally: – Use Time Machine - if you make a mistake deleting something with these precision tools then you'll be able to restore it.