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Q&A RAM disk in macOS Ventura

This solution works for me on Ventura 13.4.1. Taken from an article by Tom Nelson on the MacSales.com site, How to Create and Use a RAM Disk with Your Mac (Warnings Included!). In a terminal app, ...

posted 10mo ago by basil.work‭  ·  edited 10mo ago by basil.work‭

Answer
#2: Post edited by user avatar basil.work‭ · 2023-07-09T05:38:40Z (10 months ago)
  • This solution works for me on Ventura 13.4.1. Taken from an article by [Tom Nelson][1] on the MacSales.com site, [*How to Create and Use a RAM Disk with Your Mac (Warnings Included!)*][2].
  • In a terminal app, run:
  • ```bash
  • diskutil erasevolume HFS+ "RAMDisk" `hdiutil attach -nomount ram://2048`
  • ```
  • - `"RAMDisk"` is the name of the volume.
  • - `2048` is the number of blocks of memory to be assigned to your RAM drive.
  • Specify 2048 per meg of memory you want assigned to your RAM drive.
  • | Drive size | Argument | Math |
  • | :--: | :--: | :--: |
  • | 256 MB | **524288** | = 256 MB * 2048 |
  • | 512 MB | **1048576** | = 512 MB * 2048 |
  • | 1 GB | **2097152** | = 1024 MB * 2048 |
  • | 2 GB | **4194304** | = 2048 MB * 2048 |
  • Beware: Your data on the RAM drive disappears upon a crash or restart of the Mac.
  • [1]: https://eshop.macsales.com/blog/author/tom-n/
  • [2]: https://eshop.macsales.com/blog/46348-how-to-create-and-use-a-ram-disk-with-your-mac-warnings-included/
  • This solution works for me on Ventura 13.4.1. Taken from an article by [Tom Nelson][1] on the MacSales.com site, [*How to Create and Use a RAM Disk with Your Mac (Warnings Included!)*][2].
  • In a terminal app, run:
  • ```bash
  • diskutil erasevolume HFS+ "RAMDisk" `hdiutil attach -nomount ram://2048`
  • ```
  • - `"RAMDisk"` is the name of the volume.
  • - `2048` is the number of blocks of memory to be assigned to your RAM drive.
  • Specify 2048 per meg of memory you want assigned to your RAM drive.
  • | Drive size | Argument | Math |
  • | :--: | :--: | :--: |
  • | 256 MB | **524288** | = 256 MB * 2048 |
  • | 512 MB | **1048576** | = 512 MB * 2048 |
  • | 1 GB | **2097152** | = 1024 MB * 2048 |
  • | 2 GB | **4194304** | = 2048 MB * 2048 |
  • Beware: Your data on the RAM drive is destroyed upon a crash or restart of the Mac.
  • For more info, see the `man` pages:
  • ```bash
  • man diskutil
  • ```
  • … and:
  • ```bash
  • man hdiutil
  • ```
  • [1]: https://eshop.macsales.com/blog/author/tom-n/
  • [2]: https://eshop.macsales.com/blog/46348-how-to-create-and-use-a-ram-disk-with-your-mac-warnings-included/
#1: Initial revision by user avatar basil.work‭ · 2023-07-09T00:43:23Z (10 months ago)
This solution works for me on Ventura 13.4.1. Taken from an article by [Tom Nelson][1] on the MacSales.com site, [*How to Create and Use a RAM Disk with Your Mac (Warnings Included!)*][2].

In a terminal app, run:

```bash
diskutil erasevolume HFS+ "RAMDisk" `hdiutil attach -nomount ram://2048`
```

 - `"RAMDisk"` is the name of the volume.
 - `2048` is the number of blocks of memory to be assigned to your RAM drive. 

Specify 2048 per meg of memory you want assigned to your RAM drive.

| Drive size | Argument | Math |
| :--: | :--: | :--: |
| 256 MB |  **524288** |  = 256 MB * 2048 |
| 512 MB | **1048576** | = 512 MB * 2048 |
| 1 GB | **2097152** | = 1024 MB * 2048 |
| 2 GB | **4194304** | = 2048 MB * 2048 |


Beware: Your data on the RAM drive disappears upon a crash or restart of the Mac.




  [1]: https://eshop.macsales.com/blog/author/tom-n/
  [2]: https://eshop.macsales.com/blog/46348-how-to-create-and-use-a-ram-disk-with-your-mac-warnings-included/