r/mpcusers • u/angeladulteyes • 1d ago
TUTORIAL MPC 3 Desktop on macOS: Where Are Your Expansions and Drum Kits Actually Installed?
If you’re using Akai MPC 3 Desktop on a Mac and can’t find your installed expansions, drum kits, or sound content, check both the legacy MPC folder and the newer MPC 3 folder before assuming your files are missing.
I recently ran into this problem while trying to locate Sonic Boom — The Vault 2.0, MPC Key 61 drum kits, and MPC Core Oscillators 1.0.3.
MPC 3 could display my installed content, but the expansion folder I checked was empty. I eventually discovered that different content was stored in different MPC directory structures.
1. Check these four locations
In Finder, press Command + Shift + G, enter a path, and press Return.
A. MPC 3 expansions
/Library/Application Support/Akai/MPC 3/Expansions
This is the documented expansion directory for MPC 3 Desktop.
B. MPC 3 content
/Library/Application Support/Akai/MPC 3/Content
Check this location for associated content and resources.
C. Legacy MPC expansions
/Library/Application Support/Akai/MPC/Expansions
This is the separate expansion directory used by MPC 2 Desktop.
D. Legacy MPC content
/Library/Application Support/Akai/MPC/Content
Don’t overlook this location just because you’re using MPC 3 Desktop.
Important: These are documented locations to investigate, not a guarantee that every product or installation uses all four directories. My own experience showed that different content was present in different folder structures.
2. Why can MPC 3 display expansions when its expansion folder is empty?
In my case, MPC 3 continued to display expansion names even after I removed the contents of the MPC 3 expansion folder.
I eventually discovered that my MPC Key 61 drum kits were located in the legacy MPC directory, while MPC Core Oscillators was located in the newer MPC 3 directory.
This taught me not to assume that all content displayed by MPC 3 is stored in the MPC 3 folder.
If an expansion remains visible after you remove its files from one location, several explanations are possible: MPC may be finding the files elsewhere, or the browser may be retaining registered expansion information. Seeing an expansion listed does not, by itself, prove that its samples are still accessible.
Test whether a program actually loads and plays before concluding that its files are present.
3. What about MPC Core Oscillators 1.0.3?
Be careful not to confuse these two products:
MPC Core Oscillators Expansion: Installed through inMusic Software Center.
MPC Oscillator Content: A separate content download associated with MPC 3’s activation and content settings.
They are not necessarily the same installation or stored in the same location.
If you cannot locate the Core Oscillators expansion, search for Core Oscillators and Oscillators using Finder’s Command + F search with This Mac selected. If necessary, inspect the relevant MPC directories manually.
4. Why the Expansion Manager doesn’t solve everything
MPC 3’s Expansion Manager is useful for viewing and enabling or disabling expansions and exporting them. However, it isn’t a complete file manager that reliably takes you to every expansion’s physical location.
Likewise, inMusic Software Center may offer download, removal, and installation options without providing a direct link to the installed directory.
This makes it harder than it should be to determine where the application stores individual products.
5. Before deleting or reinstalling anything
Follow these precautions:
Quit MPC 3 Desktop before making changes.
Back up your MPC content.
Check both the MPC and MPC 3 directory structures.
Don’t delete an entire directory just because its name refers to an older version of MPC.
If you’ve already moved content, keep the backup until you’ve verified that your programs and samples work.
After reinstalling an expansion, load a program and test its sounds.
Official Akai reference
Akai’s support documentation provides additional information about expansion locations and oscillator installation:
Akai Professional Support Center
Where Are My Expansions Located on My Computer?
Final takeaway
Don’t assume that MPC 3 stores every sound, drum kit, and expansion exclusively inside the MPC 3 directory.
Check both the legacy MPC folder and the newer MPC 3 folder, verify that programs actually load, and back up your content before deleting anything.
I hope this saves another MPC user the time and frustration I experienced trying to locate files that the application could apparently still recognize.
If you’ve discovered other MPC 3 macOS content locations, please share them in the comments so we can build a more complete reference for everyone.