Memory Upgrades

Macintosh Memory Upgrades

This page links users to memory upgrade options for Macintosh computers. Before you invest in more RAM, here are two programs to consider.

RAM Charger from Jump Development ($40) lets you get the most out of your RAM - especially helpful on Macs with 8 MB or less. By launching applications using the minimum amount of memory they need, RAM Charger lets you run more programs. It also works well with RAM Doubler. You can even download a demo.
RAM Doubler from Connectix (under $60) lets you emulate virtual memory in RAM. Requires a Mac with at least 8 MB RAM, a 68030 or later CPU, and System 7.

As a rule, Apple recommends avoiding composite SIMMs in any Macintosh. A composite SIMM is one which uses less DRAM chips, but must use additional chips for bank control, address buffering, or control signals.

Certain Macintosh models have identified problems with composite SIMMs. Some Macs simply will not recognize them, while others may work for awhile before the composite SIMMs cause problems.

Apple recommends you specify non-composite SIMMs for use in your Macintosh.

And always ground yourself before removing or installing memory in your computer.

And don't forget, the more RAM your Mac has, the longer it will take to test memory at startup.

For up-to-date memory prices, visit ramseeker

Online Resources

  • RAM FAQ, MacToolbox. All about SIMMs, DIMMs, 32-bit addressing, EDO vs. FPM, VRAM, PRAM, and more.
Low End Mac is an independent publication and has not been authorized, sponsored, or otherwise approved by Apple Inc. Opinions expressed are those of their authors and may not reflect the opinion of Cobweb Publishing. Advice is presented in good faith, but what works for one may not work for all.
  Entire Low End Mac website copyright ©1997-2016 by Cobweb Publishing, Inc. unless otherwise noted. All rights reserved. Low End Mac, LowEndMac, and are trademarks of Cobweb Publishing Inc. Apple, the Apple logo, Macintosh, iPad, iPhone, iMac, iPod, MacBook, Mac Pro, and AirPort are registered trademarks of Apple Inc. Additional company and product names may be trademarks or registered trademarks and are hereby acknowledged.
  Please report errors to .
  LINKS: We allow and encourage links to any public page as long as the linked page does not appear within a frame that prevents bookmarking it.
  Email may be published at our discretion unless marked "not for publication"; email addresses will not be published without permission, and we will encrypt them in hopes of avoiding spammers. Letters may be edited for length, context, and to match house style.
  PRIVACY: We don't collect personal information unless you explicitly provide it, and we don't share the information we have with others. For more details, see our Terms of Use.

Compact Macs

Mac II

LC series


Centris & Quadra