QB Issue Resolution:

Your Mac must be an older one, using a Power PC (PPC) processor.

Quickbooks 2010 only runs on Macs with Intel processors. If a new computer is not in your immediate future, you can get a refund from Intuit – and it is also possible that they can still sell you QuickBooks 2009 which is the last version to support PPC Macs.

(It is not just Intuit … more and more software for Macs is Intel-only, in part perhaps because Snow Leopard is Intel-only. One example, is Google’s Picasa.)

Resolution for Issue 'I just bought QuickBooks 2010 and I get…”You can’t open the application “QuickBooks2010″ because it is not supported on this architecture.”' available: Yes (Solved).
Source: Intuit Community forum.

I just bought QuickBooks 2010 and I get…”You can’t open the application “QuickBooks2010″ because it is not supported on this architecture.”: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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